#Cosmology

A new study identifies the transitional point in the solar cycle when orbital decay accelerates — giving satellite operators and debris trackers a clearer picture.

A surge in rocket launches is filling orbit with satellites built from tougher, more heat-resistant materials — and when they fall back to Earth, they aren't always burning up the way we expect.

New cosmology studies suggest the universe may not be perfectly uniform, potentially challenging long-standing assumptions about space, expansion, and dark energy.

The universe may not be perfectly uniform after all, a new series of papers hints. If confirmed, this could upend a nearly 100-year-old model of cosmology.

We cannot measure the slowing of time near the Big Bang because there is no “cosmic clock” outside of this event against which to compare.

Scientists may have uncovered a surprising secret behind why life exists at all. A new study suggests that the Universe’s fundamental constants — the deep physical rules that govern everything from atoms to stars — appear to sit within an incredibly…

The Universe’s biggest black holes may not be born giants after all. Scientists analyzing gravitational-wave signals from dozens of black hole collisions found evidence that the heaviest black holes are likely “cosmic recyclers” — formed through repeated…

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The conclusion of DESI's first survey marks an important milestone for cosmology, which finds itself in a bind for the best reasons.

A model of the cyclic universe suggests that dark matter could be a population of black holes predating the Big Bang.

By studying how light from eight distant quasars is gravitationally lensed as it propagates towards Earth, astronomers have calculated a new value for the Hubble constant – a parameter that describes the rate at which the universe is exp...