What is the apparent backward motion of Mars at times in its orbit called?

Ptolemy used a complex system of deferents and _____ to explain the motion of objects in the solar system - including the retrograde motion of Mars.

The sun is on the small side for stars. Many are much larger. The sun is classified as a G2 _____ dwarf.

A main sequence star with a luminosity of 10 to the 6th Lsun is _____, brighter and gives off 1000000x the light of the sun.

The brightness of a star, or magnitude, is a "backwards" scale. The brighter a star, the ____ the magnitude number.

We looked at the emission spectrum of several different elements in a lab. The instrument we used is called a _____.

Spectroscopes use a small plastic film to create a spectrum from the incoming light. The film has a series of microscopic parallel grooves etched in its surface. This film ____ the light, creating the spectrum.

On the main sequence, as the mass of a star increases, the temperature increases and the brightness _____.

The hottest stars are what spectral class?

The orbit of every planet is an _____, with the sun at one of the foci.

A line joining a planet and the Sun sweeps out equal areas during equal intervals of _____.

Galileo found evidence that supported the Heliocentric model of the solar system that included the phases of _____, sunspots, and moons orbiting Jupiter, rather than orbiting Earth.

Which of the following are caused by release of energy from magnetic fields and release large amounts of solar plasma into the solar wind?

_____ run from the lower right corner of the HR diagram to the upper left corner.

The brightest natural object in the sky is ___.

The brightest object in the night sky is:

The brightest planet in our night sky is:

The brightest star in the night sky is:

Energy is produced in the _____ of the sun by nuclear fusion.

Energy produced in the core travels outward as photons that go through a "random walk", through the _____ zone, taking many years to reach the surface.

Energy travels through the convective zone upwards to the photosphere on large currents of heated plasma. This flow is often slowed by intense magnetic fields, cooling the photosphere in small patches called _____.

In the 1800's a huge solar storm called the ____ occurred. t caused disruptions in telegraph service and produced auroras in the night sky as far south as Cuba.

_____ are the dead core of a sun-like star that is no longer fusing anything. The star sheds its outer layers producing a planetary nebula with this object in its center.

Main sequence stars at the lower right corner of the HR Diagram are cool and _____ and ____.

Stars like the sun produce a _____ spectrum.

A planet with a very eccentric orbit will have a greater difference in its maximum and minimum velocities around the sun than will a planet with a more circular orbit.

All of the phenomena that can increase the density and speed of the solar wind are due to changing magnetic fields on the sun.

Why will the sun never become a supernova?

According to the _____ theory, our solar system formed from the collapse of a giant cloud of gas and dust in space

What “return to the moon” mission by NASA is preparing to send astronauts back to the moon in the near future?

How many astronauts can be carried to the moon in the Orion command module?

Why do we want to go back to the moon?

What is Gateway?

Where is water ice found on the Moon?

What type of map allows us to see changes in surface elevation in an area?

What do you call the north-south running lines on a globe that show your longitude?

A contour interval is the

The N-S axis of a government land survey establishing an initial point is called

After the sun, which star is closest to us? 

What NASA mission was your school involved in? This mission used satellites and ground stations to track changes in Earth’s magnetic field during auroral substorms.

What is the speed of light? 

How are stars classified?

What cloud of gas and dust are stars born in?

If you know a planet's orbital period you can determine its