On July 1, the ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope reported the discovery of A11pl3Z, an object whose orbit looked like it came from another star. Now we know that ...

The Bernardinelli-Bernstein comet, located in the Oort Cloud, was observed by the ALMA to record the first evidence of active ...

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

A comet nucleus is the solid core of a comet consisting of frozen molecules including water, carbon monoxide, carbon dioxide, methane and ammonia as well as other inorganic and organic molecules ...

The comet's approach toward Earth coincides with a total solar eclipse on April 8. Around that time, 12P/Pons-Brooks will be at or near perihelion, the point during orbit when it's closest to the sun.

In 1986, the European spacecraft Giotto became one of the first spacecraft to encounter and photograph the nucleus of a comet, passing and imaging Halley’s nucleus as it receded from the Sun ...

Scientists aimed ALMA at the comet in March 2024 and saw carbon monoxide — a gas that usually doesn’t show up in observations that far away — gushing out of its surface in jets. The team also picked ...

It's prime time to see the comet known as C/2022 E3, marked by its bright green nucleus and long faint ion tail. The comet has been visible for some time with telescopes and binoculars — but the ...

The first modern description of a comet nucleus was suggested by Fred Whipple in the 1950s. In his model, a comet was a more or less uniform body that he called an “icy conglomerate,” composed ...

While some comet experts think Comet Tsunchinchan-ATLAS ... Australian amateur astronomer Terry Lovejoy, discovered a very tiny comet, whose nucleus measured only 1,600 feet (500 meters) ...

The glowing green nucleus and near-nucleus coma of the comet will appear to look “wide” and be “half of the size of a full moon,” according to Bolin. Of course, where skies are cloudy ...

Here's the story behind how astronomers predicted when green comet C/2022 E3 (ZTF) would make its closest pass ... around a nucleus of rocky material pulled from the protoplanetary disc that ...