A pair of quasars that existed when the universe was only 3 billion years old has been spotted by the Hubble Space Telescope.
Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...
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How Our Galaxy's Black Hole Was Captured
Caltech’s Katie Bouman explains how the Event Horizon Telescope Collaboration captured the first imager of the Sagittarius A* ...
Each Monday, I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes ...
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