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Gemini Observatory's two-color composite image of C/2019 Q4 (Borisov), which is likely the first interstellar comet ever identified. Blue and red dashes are background stars that appear to streak as the comet moves.

A new image of a mysterious object careening toward our solar system strongly suggests it’s the first comet from another star system

C/2019 Q4 is likely the first comet ever detected that came from another star system. Our clearest image of it shows its dust cloud and gas tail.
Astronomers think object C/2019 Q4 (green line) could be an interstellar object, perhaps a comet from another star system.

NASA says a new comet is likely an ‘interstellar visitor’ from another star system — the second ever detected

If the comet-like object has interstellar origins, "it's the next best thing to sending a probe to a different solar system," one astronomer said.
A thick ring of space junk orbits Earth in this fanciful artist's concept of a "Kessler syndrome" event.

Satellite collisions may set off a space-junk disaster that could end human access to space. Here’s how.

Experts worry that debris orbiting Earth could lead to a "Kessler syndrome" domino effect that cuts off human access to space for hundreds of years.
The Hubble Space Telescope orbiting Earth in May 2009.

‘No image will surpass this’: Hubble telescope astronomers created a stunning picture of the deep universe with 16 years’ worth of p...

Researchers estimate the Hubble Space Telescope image includes 265,000 galaxies, some of which appear as they existed 13.3 billion years ago.
An occultation of Saturn and the moon, as seen from South Africa on March 29, 2019, using a smartphone mounted to a telescope.

A photographer recorded Saturn ‘touching’ the moon with his smartphone, and the pictures are stunning

Grant Petersen of South Africa spent months preparing to photograph the conjunction of the moon and Saturn using a Galaxy S8 phone and a telescope.
A computer simulation of how a supermassive black hole.

The first ‘groundbreaking’ pictures of a black hole may be unveiled on Wednesday. Here’s what scientists think those images will loo...

Scientists are expected to unveil the first-ever pictures of a black hole's "shadow" caused by its event horizon.
An illustration of the space object 'Oumuamua flying through the solar system in late 2017.

A bizarre interstellar object called ‘Oumuamua continues to perplex astronomers a year after it vanished. Here’s why a few scientists stil...

'Oumuamua remains a mystery since its discovery. However, the idea that it's extraterrestrial is based on a lack of data, not extraordinary evidence.
Russell "Rusty" Schweickart, a retired NASA astronaut, speaks at an event in July 2006.

Astronaut says a neglected telescope is NASA’s best chance of defending Earth from ‘city killer’ asteroids — ‘for God...

Astronaut Rusty Schweickart says the Near-Earth Object Camera telescope could locate most of the dangerous space rocks that NASA is mandated to find.
An illustration of the exoplanet candidate Barnard's star b, also known as GJ 699 b.

Astronomers found a ‘cold super-Earth’ less than 6 light-years away — and it may be the first rocky planet we’ll photograph be...

Astronomers think they've found a "cold super-Earth." It might be the first exoplanet they photograph with a coming generation of powerful telescopes.
An illustration of NASA's Kepler space telescope.

NASA’s planet-hunting Kepler telescope is dead 9 years after launching into space

The Kepler space telescope was launched in 2009 and has stared down more than 500,000 stars. But NASA says Kepler has run out of fuel.