Asteroids are rocky bodies primarily found in the asteroid belt between Mars and Jupiter, while comets are icy bodies that originate from the Kuiper Belt or Oort Cloud, developing tails when approaching the Sun.
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Our Solar System is part of the Milky Way galaxy. This spiral galaxy contains billions of stars, including our Sun, and is characterized by its distinct spiral arms and a central bulge of stars.
From the chapter Beyond Earth, I learned about the vastness of the universe, the various celestial bodies, and the significance of space exploration, which enhances our understanding of the cosmos and our place within it.
Innermost planets, or terrestrial planets, like Mercury and Venus, are rocky and smaller. In contrast, outermost planets, or gas giants, like Jupiter and Saturn, are larger, composed mainly of gases and have thick atmospheres.
The Andromeda Galaxy is significant as the nearest spiral galaxy to the Milky Way. It is on a collision course with our galaxy and is crucial for understanding galactic evolution and interactions.