WorksheetsHonors Earth And Space Science - PART 2 FULL Final Exam
Total questions: 136
Worksheet time: 1hrs 18mins
THE SUN | Solar Layers | Center of the Sun
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | 15 million K
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | Nuclear fusion occurs there
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | Visible “disk” of the Sun
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | 6,000 K
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | Other features visible
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | Convection takes place here
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | “Lower” atmosphere of the Sun
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | 30,000 K
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | Gas energized by ultraviolet light
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | “Upper” atmosphere of the Sun
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | 1-2 million K
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Layers | Gas energized by x-rays
Core
Photosphere
Chromosphere
Corona
THE SUN | Solar Features | Rising and falling convection cells
Granules
Sunspots
Plages
Prominence
Spicules
THE SUN | Solar Features | Cooler area of the photosphere, magnetism decreases convection
Granules
Sunspots
Plages
Prominence
Spicules
THE SUN | Solar Features | Hotter area of the photosphere, appears brighter
Granules
Sunspots
Plages
Prominence
Spicules
THE SUN | Solar Features | Loop of gas that arcs outward in the chromosphere following magnetic field lines
Solar Flare
Solar Wind
Plages
Prominence
Spicules
THE SUN | Solar Features | Spikes of rising gas flowing into the chromosphere
Solar Flare
Solar Wind
Plages
Prominence
Spicules
THE SUN | Solar Features | “Explosion” in the solar photosphere, extremely energetic, sends a torrent of charged particles into space which can affect Earth many ways
Solar Flare
Solar Wind
Plages
Prominence
Spicules
THE SUN | Solar Features | Constant stream of charged particles flowing outward from the corona, responsible for aurora on Earth
Solar Flare
Solar Wind
Plages
Prominence
Spicules
STARS AND STELLAR EVOLUTION | Terms | Based on the idea of brighter stars having more importance; therefore a brighter star has a lower number on the scale. Originally set up by Hipparchus, running from 1 to 6; brightest stars were magnitude 1 and dimmest stars were magnitude 6. This change in 5 magnitudes was equivalent to 100 times change in brightness.
Magnitude Scales
Absolute Magnitude
Apparent Magnitude
AU
Parsecs
STARS AND STELLAR EVOLUTION | Terms | The brightness of a celestial object as it appears from Earth; represented by a lower case m
Magnitude Scales
Absolute Magnitude
Apparent Magnitude
AU
Parsecs
STARS AND STELLAR EVOLUTION | Terms | The brightness of a celestial object as seen from 10 parsecs or 32.6 light years; referred to as the “true brightness” of an object; represented by an upper case M
Magnitude Scales
Absolute Magnitude
Apparent Magnitude
AU
Parsecs
STARS AND STELLAR EVOLUTION | Terms | The average distance from the Earth to the Sun
Magnitude Scales
Absolute Magnitude
Apparent Magnitude
AU
Parsecs
STARS AND STELLAR EVOLUTION | Terms | A unit of distance used in astronomy, equal to about 3.26 light years
Magnitude Scales
Absolute Magnitude
Apparent Magnitude
AU
Parsecs
STARS AND STELLAR EVOLUTION | Life Cycle Of Stars |
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STARS AND STELLAR EVOLUTION | Stellar Remnants - As gravity pull inward on the star, some of the material may get crushed into a very small space. The result could be a pulsar or a black hole. MASS is the determining factor | A supernova remnant approximately 10 miles across with the mass of 1.5 to 3 times the mass of our Sun; it is composed completely of neutrons
Pulsar
Black Hole
Singularity
Event Horizon
STARS AND STELLAR EVOLUTION | Stellar Remnants - As gravity pull inward on the star, some of the material may get crushed into a very small space. The result could be a pulsar or a black hole. MASS is the determining factor | A supernova remnant where more than 3-4 solar masses of material are compressed into a singular point; the intense gravitational field creates a gravity well so steep that it exceeds the escape velocity of light
Pulsar
Black Hole
Singularity
Event Horizon
STARS AND STELLAR EVOLUTION | Stellar Remnants - As gravity pull inward on the star, some of the material may get crushed into a very small space. The result could be a pulsar or a black hole. MASS is the determining factor | Point of mass and infinite density
Pulsar
Black Hole
Singularity
Event Horizon
STARS AND STELLAR EVOLUTION | Stellar Remnants - As gravity pull inward on the star, some of the material may get crushed into a very small space. The result could be a pulsar or a black hole. MASS is the determining factor | Distance from the singularity (radius) where nothing can escape the black hole
Pulsar
Black Hole
Singularity
Event Horizon
STARS AND STELLAR EVOLUTION | Binary Systems | Two stars that appear to be double by chance line of sight, not related by gravity, Ex. Alcor/Mizar
Optical Double
Visual Binary
Eclipsing Binary
Spectroscopic Binary
STARS AND STELLAR EVOLUTION | Binary Systems | Two (or more) stars that can be “split” when viewed in a telescope, Ex. Mizar, Alberio and Epsilon Lyrae (yields mass of stars)
Optical Double
Visual Binary
Eclipsing Binary
Spectroscopic Binary
STARS AND STELLAR EVOLUTION | Binary Systems | Two stars that eclipse each other due to their orbit being in Earth’s line of sight, star changes in brightness due to eclipse, Ex. Algol (yields diameter of stars)
Optical Double
Visual Binary
Eclipsing Binary
Spectroscopic Binary
STARS AND STELLAR EVOLUTION | Binary Systems | Two (or more) stars that cannot be visually split, but can be identified by the alternating red and blue shifting of their spectra, Ex. Castor (yields mass of stars)
Optical Double
Visual Binary
Eclipsing Binary
Spectroscopic Binary
STARS AND STELLAR EVOLUTION | Variable Stars - unstable stars that vary in brightness due to changes in size, period is related to true brightness, therefore they can be used to determine distance | Short period variable (less than one day)
RR Lyrae
Cepheid
Mira Variable
Nova
STARS AND STELLAR EVOLUTION | Variable Stars - unstable stars that vary in brightness due to changes in size, period is related to true brightness, therefore they can be used to determine distance | Medium period variable (a few days to a couple of months)
RR Lyrae
Cepheid
Mira Variable
Nova
STARS AND STELLAR EVOLUTION | Variable Stars - unstable stars that vary in brightness due to changes in size, period is related to true brightness, therefore they can be used to determine distance | Long period variable (months to years; red giants)
RR Lyrae
Cepheid
Mira Variable
Nova
STARS AND STELLAR EVOLUTION | Variable Stars - unstable stars that vary in brightness due to changes in size, period is related to true brightness, therefore they can be used to determine distance | White dwarf in a binary pair temporarily flares up when hydrogen stolen from the partner star builds on the white dwarf and finally fuses
RR Lyrae
Cepheid
Mira Variable
Nova
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Spiral; bright nucleus with tightly wound arms
Sa
Sb
Sc
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Spiral; arms less tightly wound
Sa
Sb
Sc
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Spiral; small nucleus with loose arms
Sa
Sb
Sc
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Spiral Barred; tightly bound arms
SBa
SBb
SBc
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Spiral Barred; less tight wound arms
SBa
SBb
SBc
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Spiral Barred; loose wound arms
SBa
SBb
SBc
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Ellipticals - Classified by how ___________ the galaxy appears
Tightly Wound
Circle
Oval
Loosely Wound
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Ellipticals; E0
Almost Spherical
Very Oval
GALAXIES AND COSMOLOGY | Hubble Galaxy Classification | Ellipticals; E7
Almost Spherical
Very Oval
GALAXIES AND COSMOLOGY | Galaxies | Flattened, rotating galaxy
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Bulge or nucleus
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Disk or spiral arms
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Comes in a barred type
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Pinwheel-like arms of interstellar material and young stars winding out from it's nucleus
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Round or elliptical in outline
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Contains little gas and dust
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | No disk or spiral arms
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Few, hot, bright stars
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Egg shaped
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Lacks symmetry
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | No basic shape
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Galaxies | Large and Small Magellanic Clouds are examples
Spiral
Elliptical
Irregular
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Central part of the MWG located in the direction of Sagittarius (summer sky); Population II stars (older, redder, metal poor stars)
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Central part of the MWG located in the direction of Sagittarius (summer sky)
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Population II stars (older, redder, metal poor stars)
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Out spiral structure of the MWG
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | The Sun is located just inside the Cygnus-Orion arm
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Gas and dust is locate within the disk
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Open clusters are located within the disk
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Population I star (younger, hotter, metal rich stars)
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Spherical component of the MWG
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Composed of approximately 200 globular cluster (Population II stars)
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Center of the MWG
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Dominated by a supermassive black hole known as Sag A* - approximately 3-4 million solar mass units
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Milky Way Galaxy Structure | Dominated by dark matter (matter that has no energy signature, but its influence is known by effects of gravity)
Galactic Bulge
Galactic Disk/Arms
Galactic Halo
Galactic Nucleus
Galactic Corona
GALAXIES AND COSMOLOGY | Evidence For Big Bang | 99.9 % of all galaxies are red-shifted, meaning that they are receding from Earth
Red-Shift Of Galaxies
Cosmic Microwave Background Radigtion
GALAXIES AND COSMOLOGY | Evidence For Big Bang | A greater red-shift means a higher velocity, and that the galaxy is located farther from the Earth.
Red-Shift Of Galaxies
Cosmic Microwave Background Radiation
GALAXIES AND COSMOLOGY | Evidence For Big Bang | Scientists at Princeton University predicted left-over energy should exist as a result of the Big Bang; this energy would be “stretched” or red-shifted into the microwave or radio section of the electromagnetic spectrum; the temperature of this radiation was expected to be approximately 3-4 K
Red-Shift Of Galaxies
Cosmic Microwave Background Radiation
GALAXIES AND COSMOLOGY | Evidence For Big Bang | Meanwhile, at Bell Labs Arno Penzias and Robert Wilson had detected “mysterious” background radiation while testing a new horn antenna. The radiation that Penzias and Wilson detected had the expected temperature (2.7 K) of the energy left over from the Big Bang
Red-Shift Of Galaxies
Cosmic Microwave Background Radiation
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Large amounts of water vapor and uplift
Necessary Elements
Causes Of Uplift
Severe Thunderstorms
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Cold front, mountain side, jet stream, intense heating near surface of Earth
Necessary Elements
Causes Of Uplift
Severe Thunderstorms
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Minimum 50 m. p. h. wind gusts (80 k. p. h.) and 2 cm hail present
Necessary Elements
Causes Of Uplift
Severe Thunderstorms
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Frontal are also called...
Organized
Local
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Air Mass are also called...
Organized
Local
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Air Mass are also called...
Organized
Local
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Uplift is caused by a cold front; extremely unstable warm humid air is forced to rise violently ahead of a cold dense air mass (cP)
Organized
Local
Air Mass
Frontal
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Storms typically last 2-3 hours
Organized
Local
Air Mass
Frontal
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Occur anytime of day
Organized
Local
Air Mass
Frontal
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Uplift is caused by extremely unstable air mass (mTk), typically in summer
Organized
Local
Air Mass
Frontal
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Storms last 20-30 minutes
Organized
Local
Air Mass
Frontal
WEATHER PATTERNS AND SEVERE WEATHER | Thunderstorms | Occur in the late afternoon or early evening
Organized
Local
Air Mass
Frontal
WEATHER PATTERNS AND SEVERE WEATHER | Lightning |
Form of static electricity – air is not a good conductor; charge builds up due to lack of conduction
Vertical updrafts/downdrafts strip electrons off of water molecules; hailstones or ice particles may also transfer energy to supercooled water to produce a charge
Positive charge builds at the top of the cloud; negative charge builds near the bottom, which in turn INDUCES a positive charge on high objects on the ground (by electrostatic repulsion; electrons are repulsed because like charges repel)
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WEATHER PATTERNS AND SEVERE WEATHER | Lightning |
A single lightning bolt may have:
1-2 million volts
100,000 amperes (measure of the flow of electrons)
And heats the air to 30,000 kelvin (50,000 degrees F)
As the air expands in the lightning channel we hear THUNDER
Most lightning occurs from cloud to cloud (only 20% of all strikes make contact with the ground)
When lightning contacts ground, the first stroke (called the leader stroke) causes electrons to move upward; this is following by many return strokes where electrons are moving between ground and cloud
General relationship: every 5 seconds between lightning and thunder equals about 1 mile distance (3 seconds per kilometer)
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WEATHER PATTERNS AND SEVERE WEATHER | Lightning |
Lightning safety/precautions:
Get inside
Stay away from windows
Avoid taking showers, washing dishes…
Avoid using electronic equipment
Electronic equipment could be damaged if your house or electric service takes a surge from a lightning strike
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WEATHER PATTERNS AND SEVERE WEATHER | Tornadoes |
Intensely rotating columns of air – wind speeds may approach 300 mph or 500 kph
Rotating columns are called funnel clouds before they touch down
Tornadoes actually pull air in near the surface and upward
The column of air is condensed water vapor which takes on the color of the material in the wind system
Average tornadoes are 140 meters wide at the base of the funnel and last 10 minutes on the ground
Strong tornadoes are actually multiple funnels at the base of a main funnel
Rotating columns of air increase their speed due to conservation of angular momentum
Most strong tornadoes form on the southwest edge of a thunderstorm
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WEATHER PATTERNS AND SEVERE WEATHER | Tornadoes |
Tornado safety:
Get to a basement or storm cellar
Be prepared with water, radio, mattress for protection, cell phone
In the absence of a cellar, get to an interior room on the first floor
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WEATHER PATTERNS AND SEVERE WEATHER | Hurricanes |
Definition - tropical storm with maximum sustained winds of 74 mph (64 knots)
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THE SOLAR SYSTEM | Terms | Anticyclone, high pressure system in the southern hemisphere, stable sinking air, has been present for over 300 years, recent years the spot is less red and shrinking in size
Great Red Spot (Mars)
Great White Spot (Saturn)
Great Dark Spot (Neptune)
THE SOLAR SYSTEM | Terms | “Storm in northern hemisphere”
Great Red Spot (Mars)
Great White Spot (Saturn)
Great Dark Spot (Neptune)
THE SOLAR SYSTEM | Terms | Darker clouds in the atmosphere; sinking air, high pressure
Belts
Zones
Coronae
Complex Ridged Terrain
THE SOLAR SYSTEM | Terms | Lighter clouds in the atmosphere; rising air, low pressure
Belts
Zones
Coronae
Complex Ridged Terrain
THE SOLAR SYSTEM | Terms | Crowned areas likely associated with a mantle plume; typically surrounded by chasms up to several kilometers deep (similar to trenches on Earth)
Belts
Zones
Coronae
Complex Ridged Terrain
THE SOLAR SYSTEM | Terms | Areas that have been faulted, rifted and uplifted
Belts
Zones
Coronae
Complex Ridged Terrain
THE SOLAR SYSTEM | Moons | Most geologically active body in the solar system; volcanoes of ice and rock (mostly ices, water, carbon dioxide, ammonia, methane and sulfur compounds); volcanoes form due to tidal forces of Jupiter and primarily Ganymede; causes stretching of Io’s crust; friction and heat cause the ices to vaporize exploding as volcanoes on Io’s surface; volcanic material is swept into a ring by Jupiter’s magnetic field producing the Io plasma torus; deadly radiation is within the torus
Io (Jupiter)
Ganymede (Jupiter)
Callisto (Jupiter)
Europa (Jupiter)
THE SOLAR SYSTEM | Moons | Completely ice covered (young surface) probably from tidal forces enacting on a sub-surface ocean; tides of the ocean cause cracks in the ice; ocean is saltwater; problem would be penetrating the 5 to 10 kilometer thick ice; life is possible here
Io (Jupiter)
Ganymede (Jupiter)
Callisto (Jupiter)
Europa (Jupiter)
THE SOLAR SYSTEM | Moons | Largest moon in the solar system; bigger than Mercury; causes tidal forces on Io and Europa
Io (Jupiter)
Ganymede (Jupiter)
Callisto (Jupiter)
Europa (Jupiter)
THE SOLAR SYSTEM | Moons | Most heavily cratered object in the solar system; very old surface due to the high crater density; supports the heavy bombardment period of the early solar system
Io (Jupiter)
Ganymede (Jupiter)
Callisto (Jupiter)
Europa (Jupiter)
THE SOLAR SYSTEM | Moons | Name means fear, very small captured moon; smaller than Berks County
Phobos (Mars)
Deimos (Mars)
Titan (Saturn)
Triton (Neptune)
THE SOLAR SYSTEM | Moons | Name means hate, very small captured moon; smaller than Berks County
Phobos (Mars)
Deimos (Mars)
Titan (Saturn)
Triton (Neptune)
THE SOLAR SYSTEM | Moons | Largest of planet’s moons, moon with an atmosphere of nitrogen, clouds of methane, traces of ammonia, may harbor oceans of hydrocarbons
Phobos (Mars)
Deimos (Mars)
Titan (Saturn)
Triton (Neptune)
THE SOLAR SYSTEM | Moons | Largest moon – has a retrograde orbit around planet; probably captured KBO, has very few craters, indicating an active surface, ice geysers – giving off high amounts of organic compounds
Phobos (Mars)
Deimos (Mars)
Titan (Saturn)
Triton (Neptune)
THE SOLAR SYSTEM | Terms | A region beyond Neptune that contains thousands of small icy/rocky bodies
Kuiper Belt
Asteroid Belt
Asteroids/Meteroids
Stoneys
THE SOLAR SYSTEM | Terms | A region between Mars and Jupiter containing thousands of small irregular planetoids composed of rock/iron
Kuiper Belt
Asteroid Belt
Asteroids/Meteroids
Stoneys
THE SOLAR SYSTEM | Terms | In orbit around the Sun; difference is size
Kuiper Belt
Asteroid Belt
Asteroids/Meteroids
Stoneys
THE SOLAR SYSTEM | Terms | Primarily made of rock
Kuiper Belt
Asteroid Belt
Asteroids/Meteroids
Stoneys
THE SOLAR SYSTEM | Terms | Made of rock and iron; were once inside a planetoid at the crust/mantle boundary
Stoney-Irons
Irons
Meteors
Meteorite
THE SOLAR SYSTEM | Terms | Made of iron; were once the core of a small planetoid
Stoney-Irons
Irons
Meteors
Meteorite
THE SOLAR SYSTEM | Terms | “Shooting stars”; small (pea size or smaller) meteoroids that enter the Earth’s atmosphere and burn up due to friction with the air
Stoney-Irons
Irons
Meteors
Meteorite
THE SOLAR SYSTEM | Terms | The remain of any meteoroid that hits the Earth’s surface because it was too large to completely vaporize in the atmosphere
Stoney-Irons
Irons
Meteors
Meteorite
THE SOLAR SYSTEM | Terms | Small icy dirt balls that have highly elliptical orbits (very eccentric) with a perihelion that brings them close to the Sun; at perihelion the comet sublimates profusely
Comets
Nucleus
Coma
Ion Tail
Dust Tail
THE SOLAR SYSTEM | Terms | The actual chunk of ice and rock
Comets
Nucleus
Coma
Ion Tail
Dust Tail
THE SOLAR SYSTEM | Terms | Temporary atmosphere formed by close approach to the Sun
Comets
Nucleus
Coma
Ion Tail
Dust Tail
THE SOLAR SYSTEM | Terms | Made of gases whose electrons are ionized and giving off light (emission spectra); tail always points straight away from the Sun due to the pressure from the solar wind
Comets
Nucleus
Coma
Ion Tail
Dust Tail
THE SOLAR SYSTEM | Terms | Made of rock/dust particles; this tail curves because the particles begin to orbit the Sun; these particles supply the “monthly” meteor showers on Earth
Comets
Nucleus
Coma
Ion Tail
Dust Tail
STARS AND STELLAR EVOLUTION | Spectral Classes | COLOR: bluish-white (2)
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | COLOR: blue to bluish white to white
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | COLOR: yellow-white
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | COLOR: yellow
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | COLOR: yellow to orange
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | COLOR: red
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 30,000 to 60,000
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 10,000-30,000
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 7,500-10,000
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 6,000-7,500
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 5,000-6,000
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 3,500-5,000
(a)
STARS AND STELLAR EVOLUTION | Spectral Classes | PHOTOSPHERE TEMPERATURE IN KELVIN: 2,500-3,500
(a)
GALAXIES AND COSMOLOGY | Big Bang Theory |
Idea of an expanding universe was first proposed in 1927 by Catholic Belgium priest Georges Lemaitre, based on red-shift studies of “spiral nebula” (really galaxies) by Vesto Slipher (1910).
This idea was supported by Edwin Hubble’s calculations that galaxies were receding from Earth in every direction, and that a galaxy’s red-shift was directly proportional to its distance.
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