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Although we cannot see it, dark matter is thought to make up most of the mass of the universe. Unlike normal matter, which has mass, occupies space, and can be seen through the human eye or a telescope that shows other wavelengths, dark matter is invisible and almost undetectable.
Researchers have been elucidating the role of dark matter in the universe for years, and astronomers now believe it makes up 27 percent of the universe. Dark energy, which is thought to be involved in the expansion of the universe, is thought to account for 68%.
Huge instruments aboard the Hubble Space Telescope, which has been orbiting Earth for decades, detect celestial objects invisible to the human eye. This data has given scientists a deeper understanding of the invisible universe, but it can also call into question the cosmological models scientists use to explain how the universe works.
This free book highlights some of the discoveries made possible by the Hubble mission and unravels the mysteries revealed in plain English. It’s also packed with mission photos and quotes from experts, and includes links to videos that go deeper into topics like the Hubble constant and the rate of expansion of the universe.
“There’s still a lot of work to do, but this book will give you a front-row seat to what’s happening on this quest,” Ken Carpenter, Hubble Operations Project Scientist, said in a news release. Stated. This book is his fifth in a similar series about the Hubble mission and its discoveries.
Want to know more about the mysterious forces around you? Download this book in PDF or EPUB format at bit.ly/hubblebook.
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