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EntertainmentHow do scientists measure the mass of a star?
Almost everything in the universe has mass, from atoms and subatomic particles, to huge groups of galaxies.99.99% white dwarf atmosphere is pure oxygen
Astronomers first discovered a white dwarf with an outer layer containing 99.99% oxygen.
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Xinjiang - The Unincorporated Area in China
How many days on Earth is one day on the Moon?
Hubble telescope captures image of 'bridge' connecting two galaxies
Why is interstellar travel impossible today?
When cattle in a herd are attacked, why don't the others help?
In ancient times, there was no market in the palace, so where did the concubines spend their monthly money?
Ancient Diaries Reveal the Construction of the Great Pyramid of Giza
Discovery of mysterious dwarf planet beyond Neptune stuns astronomers
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