ASTRO 101 MODUEL 1
The Astronomical Unit (AU) as defined by astronomers is
the average distance between the Earth and the Sun
Which celestial body is closest to us? Moon Mars Sun Milkyway
Moon
The star that provides energy for life on Earth is
The Sun
Of these, which is the largest? Earth The Solar System Jupiter The Milky Way Galaxy The Universe
The Universe
A large body in space that consistently makes its own light (instead of merely reflecting another body's light) is called a star a planet a moon a light year a satellite
a star
The way scientists know that a hypothesis in astronomy is a reasonable description of nature is to
do experiments and make observations about the predictions of the hypothesis
Even with the best and largest telescopes, we can't see all the stars in the Milky Way Galaxy, even though these same telescopes can show us other galaxies. Why is that?
dust in the space between stars builds up over large distances and blocks the light of stars behind the dustier parts of the Milky Way
By the term universe, astronomers mean
everything that we can observe
All molecules (like molecules of water or carbon dioxide) are made up of
two or more atoms
Which of the following is the Earth NOT located in? the solar system the Milky Way Galaxy the Local Group of galaxies The Virgo supercluster
you can't fool me, we are located in all of the above