Astronomy

What is astronomy?

• Astronomy is the study of everything in space, like stars, planets, moons, and galaxies.

• Astronomy is everything that exists, including all matter, energy, space and time.

• Astronomy is a system consisting of the Sun, eight planets, five officially named dwarf planets, moons, asteroids, comets and other celestial objects

• Astronomy is is the arena for stars, planets, galaxies, and the mysteries of the cosmos.

The Earth was considered the center of the universe by the ancient Greeks.

What model is this?

• The Heliocentric Model

• The Geocentric model

• Solar system

There were some problems with the geocentric model...

• Planets appear to occasionally go backward across the sky

• The Sun, Moon and planets do not move at the same speed all the time.

• Planets orbited the Sun in perfect circles.

• Many people couldn't accept the model

Contributions of Johannes Kepler:

• Formulated 1 laws of planetary motion.

• Formulated 2 laws of planetary motion.

• Formulated 3 laws of planetary motion.

• Formulated 4 laws of planetary motion.

Who are considered as modern astronomers:

• Isaac Newton

• Carl Sagan

• Galileo Galilei

• Claudius Ptolemy

Which telescope recently considered the most powerful space telescope?

• Spitzer Telescope

• Kepler Space Telescope

• James Webb Space Telescope

• Chandra X-Ray Observatory

What discovery did Edwin Hubble make?

• Discovered that the universe is expanding.

• Discover the gravity.

• Discover moons of Jupiter

• Discover our solar system

What kind of program does NASA create to bring back the collected samples from Mars?

• Mars Sample Return Program

• Mars Exploration Program

• Mars Geology Program

• Sample From Mars Program

What is the primary difference between the Geocentric and Heliocentric models?

• The shape of Earth

• The center of the Universe

• The number of planets

• The existence of the Moon

What did the Heliocentric model correct about the Geocentric model?

• It showed that planets orbit the Sun, not Earth.

• It proved that the Earth is flat.

• It suggested that Earth has no moon.

• It introduced the concept of dark matter.