Nearly every galaxy has a supermassive black hole. The few that don't have had theirs ejected during a galactic collision. That's because galaxies and their black holes have formed hand in hand. There is still some debate ...
Astronomy
Sep 8, 2026
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Halley's Comet captures the imagination in a way that few other astronomical objects do. When it last made its approach toward the sun (admittedly when this author, who is now middle-aged, was 1 year old in 1986), humanity ...
Space Exploration
Sep 8, 2026
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15
Active black holes are easy to detect. Their superheated accretion disks emit bright X-rays, and the jets streaming from their poles are easily seen at visible and radio wavelengths. But most stellar-mass black holes are ...
Astronomy
Sep 8, 2026
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We know the universe is constantly expanding. We also know that gravitationally bound objects, such as solar systems and black holes, seem to be immune to that expansion. But a new paper by theoretical physicists Valerio ...
Astronomy
Sep 8, 2026
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Astronauts who undergo long-duration spaceflight aboard the International Space Station often return with health problems that resemble some age-related conditions in people on Earth.
Space Exploration
Sep 8, 2026
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10
"Seeing the Earth from above is a powerful reminder of our interdependence," said Thomas Pesquet. The words of France's 10th astronaut to head into space are a reminder of how we are "in this together," something the world's ...
Space Exploration
Sep 7, 2026
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8
In 2012, the Dark Energy Spectroscopic Instrument (DESI) was commissioned to measure the effect of dark energy, the mysterious force driving the expansion of the cosmos. Since then, the DESI Legacy Imaging Surveys have obtained ...
Astronomy
Sep 7, 2026
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39
Current gravitational-wave observatories aren't sensitive enough to capture the gravitational waves of binary stars. They can only see the gravitational chirps of black holes just as they are merging. But that will change ...
Astronomy
Sep 7, 2026
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139
The Sloan Digital Sky Survey (SDSS), the largest multispectral imaging and spectroscopic redshift survey of the cosmos, has released its 20th data release (DR 20). It is also the third release of the survey's fifth phase ...
Astronomy
Sep 7, 2026
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34
Germany's Isar Aerospace launched a rocket into orbit from Norway on Saturday as Europe races to boost its ability to economically send satellites into space independently of the United States.
Space Exploration
Sep 6, 2026
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