Learn about stars and galaxies.

This is Earth You live somewhere in this massive looking planet And everything you have ever interacted with in your life stays here But this huge planet Is how big as compared to the vast scale of the Universe?  For comparison sake, we take Moon. So moon looks very close to us because this is the only space object that we see so close from us during night. But, moon is not actually that close from us Moon is actually this far away from us. Between this distance, easily 30 Earths could fit! And if somehow we were able to travel moon in a car at 100 Km/hr speed Then it'll take us 160 days! Once we reach moon, Earth will look somewhat like this from there. So Earth surely looks pretty huge, right?    Now let's see how does this same blue planets look from Mars So this is a picture taken on Mars by space probe This small dot, is our Earth! And it looks like this from Martian surface. Mars's average distance from Earth is 225 Million kilometers from Earth And it ...

 Beautiful and mysterious, peaceful and serene, the moon is the brightest object in the night sky. Jupiter and Saturn have more than sixty moons each. Neptune has thirteen moons. Even Mars has two moons. But the Earth, our planet, only has one moon, our nearest neighbor in space. Even though the moon is close to us when compared to other planets, it is still very, very far away.   The moon is about 239 thousand miles or 384 thousand kilometers away. You would have to travel all the way around the Earth nine and a half times to go the same distance as the space between the Earth and the Moon. The moon is much smaller than the Earth. Ifthe Earth was hollow, about fifty moons could fit inside. Because it is so much smaller than the Earth, the moon's gravity is much weaker.   This means that if you were to visit the moon, you would weigh much less than you do on earth, only about 1/6th of your current weight. That means that if a giraffe was on...

 Mars: the fourth plant from the sun, is the second smallest planet in the solar system, larger only than Mercury. Mars, as one of the five planets visible to the unaided eye, has been known to astronomers since ancient times: it was first recorded by ancient Egyptian astronomers about 4,000 years ago.  Mars is often called the Red Planet, because of its reddish color. Modern astronomers know that Mars is red because of large amounts of iron oxide, or rust, in the rocks and dust on the surface, but in ancient times people associated its red color with warfare. That is why Mars was named for the ancient Romangod of War.   Mars is a small, rocky planet, the last ofthe planets of the inner solar system. It is about 141 million miles, or more than 227million kilometers from the sun, so it gets less than half as much sunlight as the earthdoes.   Temperatures at the frozen poles may dip as low as negative 225 degrees Fahrenheitor negative 143 degrees ...