The expansion of the universe at some stage of evolution is well described by the Friedmann model. It was derived from general relativity a hundred years ago, but it is still considered one of the most important and relevant ...
General Physics
Jan 22, 2024
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219
The U.S. Postal Service has issued two new Priority Mail stamps celebrating NASA's James Webb Space Telescope, the largest, most powerful, and most complex telescope ever put in space. The stamps, issued Jan. 22, feature ...
Astronomy
Jan 22, 2024
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20
One of the key missions of the NASA/ESA/CSA James Webb Space Telescope is to probe the early universe. Now, the unmatched resolution and sensitivity of Webb's NIRCam instrument have revealed, for the first time, what lies ...
Astronomy
Jan 18, 2024
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102
Researchers have discovered the oldest black hole ever observed, dating from the dawn of the universe, and found that it is 'eating' its host galaxy to death.
Astronomy
Jan 17, 2024
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164
Columbia researchers analyzing images from NASA's James Webb Space Telescope have found that galaxies in the early universe are often flat and elongated, like breadsticks—and are rarely round, like balls of pizza dough.
Astronomy
Jan 17, 2024
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125
The discovery of a second ultra-large structure in the remote universe has further challenged some of the basic assumptions about cosmology.
Astronomy
Jan 15, 2024
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1668
Astronomers routinely explore the universe using different wavelengths of the electromagnetic spectrum from the familiar visible light to radio waves and infrared to gamma rays. There is a problem with studying the universe ...
Astronomy
Jan 15, 2024
3
108
The Dark Energy Survey took an entire decade to produce a value for the cosmological constant—and it's smaller than you might think! There were other stories as well, including one about primeval black holes, and because ...
What is the universe made of? This question has driven astronomers for hundreds of years.
Astronomy
Jan 13, 2024
42
102
Giants once roamed the karst plains of southern China, three-meter tall apes weighing in at 250 kilograms. These very distant primate relatives—Gigantopithcus blacki—went extinct before humans arrived in the region, with ...
Paleontology & Fossils
Jan 10, 2024
5
375
