This new finding from the NANOGrav team is like adding another color – gravitational waves – to the picture of the early universe that is just starting to emerge, in large part thanks to the James Webb Space Telescope.
Physicists believe most of the matter in the universe is made up of an invisible substance that we only know about by its indirect effects on the stars and galaxies we can see. But the nature of dark matter is a longstanding puzzle.
All forms of energy affect the expanding Universe. But if matter and radiation slow the expansion down, how does dark energy speed it up?
Research led by the Atacama Cosmology Telescope collaboration maps the universe’s cosmic growth supporting Einstein's theory of general relativity.
How, and whether, to keep atomic time in sync with Earth's rotation is still up for debate.
A group including Native Hawaiians will now manage the mountain Maunakea, where Indigenous rights and astronomy have collided.
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On May 12, 2022, astronomers on the Event Horizon Telescope team released an image of a black hole called Sagittarius A* that lies at the center of the Milky Way galaxy. Chris Impey, an astronomer at the University of Arizona, explains how the team got this image and why it is such a big deal.
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