In "Greenland," the space-impact disaster movie gets a makeover in response to new science and new social realities.

Scientists say C/2019 Q4 is a comet from another galaxy.

The first-ever interstellar comet is showing signs of brightening, suggesting it may have been heated up as it passed near to the sun

The interstellar comet Borisov, which flew past Earth in December, is full of carbon monoxide ice that implies its home star is smaller and colder than our sun

Astronomers using NASA’s Neil Gehrels Swift Observatory have tracked water loss from 2I/Borisov, the first known interstellar comet to visit our Solar System, as it approached and rounded the Sun. Their findings were published in the Astrophysical Journal Letters. 2I/Borisov was detected on August 30, 2019 by Gennady Borisov, an astronomer at the Crimean Astrophysical [...]

The interstellar comet Borisov, which flew past Earth in December, is full of carbon monoxide ice that implies its home star is smaller and colder than our sun

Researchers from NASAs Goddard Space Flight Center found that it must have formed in the outer edges of its original star system - known as Kruger 60.