The Inner Solar System: The Sun, Mercury, Venus, Earth, and Mars (repost)
The Inner Solar System: The Sun, Mercury, Venus, Earth, and Mars (An Explorer's Guide to the Universe) By Erik Gregersen
Publisher: Rosen Education Service 2009-12-20 | 224 Pages | ISBN: 1615300120 | PDF | 8 MB
Publisher: Rosen Education Service 2009-12-20 | 224 Pages | ISBN: 1615300120 | PDF | 8 MB
Ancient people around the globe once believed the Moon, Sun, planets, and stars were gods and goddesses, demons and angels revolving around Earth, the centre of their universe. Little did they know that Earth is a mere speck in a vast universe. It took many centuries for people to realize that Earth isn’t even the centre of our solar system. It is, however, one of the components of what’s known as the inner solar system— comprised of the Sun, four terrestrial planets, and the moons that orbit them—which is examined thoroughly in this book.