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Only black holes and neutron stars can spin this fast — usually by accreting material from

According to legend, the ancient giant Enceladus vents sulfur from his tomb. According to data

Here's how to observe the historic space telescope’s first few targets for yourself

Black holes are surrounded by a spherical event horizon, and your spaceship can indeed fly

Among the billions of galaxies across space, humans have only physically traveled an imperceptibly small

Astrobiologists and planetary protection experts are far more concerned about contaminating Enceladus than about contaminating

It took 200 years to find black holes, but now we know they must be

Our galaxy is going to collide with its nearest major neighbor 4 billion years from

Celebrate the First Quarter Moon, catch Comet Lemmon in the northern sky, and look for

Comet Pons-Brooks has been given the moniker Devil Comet. But is not dangerous and

A bright comet passes Earth and Uranus reaches opposition as the Leonid meteor shower ramps

This is how long a year is on other planets in our solar system, beginning

Black holes are regions where gravity is so outrageously strong that nothing, not even light

The first population of binary-stripped stars reveal "a universe that is far more interconnected

The observable universe can be measured — but there could be a lot more space out

What is time? Sten Odenwald explains how recent theories about the quantum nature of gravity

Unexpectedly, the James Webb Space Telescope is spotting mammoth black holes anchoring relatively small galaxies

Just because the Sun has another 5 billion years of fuel in the tank doesn

The expansion of the universe explains how it can be so much larger than 13.8

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