What in the Universe? Jake Black
Publisher: Penguin Young Readers Group

For humans, contemplating even the size of Earth can be a struggle. The universe contains all of the galaxies, stars, and planets. The universe is a vast expanse of space which contains all of the matter and energy in existence. You know -- whatever it was that showed up first. The universe is a big place, and it is home to a lot of big objects. The ultimate fate of the universe is a topic in physical cosmology. We only know about a small fraction of the matter in the Universe. VideoWhen you look out into the abyss of space, you might be surprised to find how sparsely populated it all is. All Alone in the Universe [Lynne Rae Perkins] on Amazon.com. A galaxy is a large group of many millions of stars. Based on what we can observe, the universe appears to be almost 28 billion light -years in diameter. I am very confused about things my science book says about the expanding universe. The rest is a mysterious substance known only as dark matter. *FREE* shipping on qualifying offers. Origin of the universe Have you ever thought about the beginning? Before last summer Maureen and I were best friends. So how do we know what's actually going on right now in other parts of the Universe? However, it is far larger than that. Our Sun is just one of at least 200 billion stars in our galaxy, the Milky Way.