Comets TOP STORY

NRL Telescope Discovers SOHO 's 4,000th Comet

© NRL

Mars Imaged by Hubble

The U.S. Naval Research Laboratory's Large Angle Spectrometric Coronagraph (LASCO) instrument identified the 4000th comet discovered by the Solar and Heliospheric Observatory (SOHO), a joint mission between the European Space Agency and NASA on June 15.


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Hubble Watches Comet ATLAS Disintegrate

© NASA

Mars Imaged by Hubble

These two Hubble Space Telescope images of comet C/2019 Y4 (ATLAS), taken on April 20 and 23, 2020, provide the sharpest views yet of the breakup of the fragile comet.

Interstellar Comet Borisov Likely Comes from a Red Dwarf Star

Interstellar Comet Borisov Likely Comes from a Red Dwarf Star

Comet 2I/Borisov seemingly came out of nowhere late last summer, when comet hunter Gennadiy Borisov in Crimea discovered the vagabond coursing toward our star.


Outbound Comets Are Likely of Alien Origin

Outbound Comets Are Likely of Alien Origin

Astronomers at the National Astronomical Observatory of Japan (NAOJ) have analyzed the paths of two objects heading out of the solar system forever and determined that they also most likely originated from outside of the solar system.


Hubble Watches Interstellar Comet Borisov Speed Past the Sun

Hubble Watches Interstellar Comet Borisov Speed Past the Sun

The NASA/ESA Hubble Space Telescope has once again captured comet 2I/Borisov streaking through our solar system on its way back into interstellar space.


TESS Catches A Comet Outburst In Unprecedented Detail

TESS Catches A Comet Outburst In Unprecedented Detail

This is the most complete and detailed observation to date of the formation and dissipation of a naturally-occurring comet outburst. The team members reported their results in the November 22 issue of The Astrophysical Journal Letters.


New Close-up Image Of The Interstellar Comet 2l/Borisov

New Close-up Image Of The Interstellar Comet 2l/Borisov

2l/Borisov, first spotted this summer, continues to draw nearer to Earth and will reach its closest approach -- about 190 million miles -- in early December.


How LISA Pathfinder Detected Dozens of 'Comet Crumbs'

How LISA Pathfinder Detected Dozens of 'Comet Crumbs'

LISA Pathfinder, a mission led by ESA (the European Space Agency) that included NASA contributions, successfully demonstrated technologies needed to build a future space-based gravitational wave observatory, a tool for detecting ripples in space-time produced by, among other things, merging black holes.


Interstellar Bodies Originating From Beyond Our Solar System

Interstellar Bodies Originating From Beyond Our Solar System

Astonishingly, not one but two interstellar asteroids have been detected entering our solar system since 2017.


Beyond Jupiter, Researchers Discover a 'Cradle of Comets'

Beyond Jupiter, Researchers Discover a 'Cradle of Comets'

Comets are known to have a temper. As they swoop in from the outer edges of our solar system, these icy bodies begin spewing gas and dust as they venture closer to the Sun.


Hubble Observes Interstellar Comet 2I/Borisov

Hubble Observes Interstellar Comet 2I/Borisov

On 12 October 2019, the NASA/ESA Hubble Space Telescope provided astronomers with their best look yet at an interstellar visitor -- Comet 2I/Borisov -- which is believed to have arrived here from another planetary system elsewhere in our galaxy.


Interstellar Comet with a Familiar Look

Interstellar Comet with a Familiar Look

For decades, astronomers have speculated that the space between stars may be populated by exosolar minor bodies -- comets and asteroids -- ejected from their home planetary systems.


Get Ready For More Interstellar Objects

Get Ready For More Interstellar Objects

Gregory Laughlin and Malena Rice weren't exactly surprised a few weeks ago when they learned that a second interstellar object had made its way into our solar system.


Collapsing Cliffs Bouncing Boulders om Comet 67P

Collapsing Cliffs Bouncing Boulders om Comet 67P

Scientists analysing the treasure trove of images taken by ESA's Rosetta mission have turned up more evidence for curious bouncing boulders and dramatic cliff collapses.


Migrating Scarps as a Significant Driver for Cometary Surface Evolution

Migrating Scarps as a Significant Driver for Cometary Surface Evolution

Rosetta observations of 67P/Churyumov-Gerasimenko (67P) reveal that most changes occur in the fallback-generated smooth terrains, vast deposits of granular material blanketing the comet's northern hemisphere.


Comet 67P/Churyumov-Gerasimenko Has A Tiny Moon -  A 'Churymoon'

Comet 67P/Churyumov-Gerasimenko Has A Tiny Moon - A 'Churymoon'

Comet 67P/C-G is a dusty object. As it neared its closest approach to the Sun in late July and August 2015, instruments on Rosetta recorded a huge amount of dust enshrouding the comet.


How The Shoemaker-Levy 9 Comet Impact On Jupiter Led to Planetary Defense

How The Shoemaker-Levy 9 Comet Impact On Jupiter Led to Planetary Defense

Twenty-five years ago, humanity first witnessed a collision between a comet and a planet.


Comet Inspires Chemistry for Making Breathable Oxygen on Mars

Comet Inspires Chemistry for Making Breathable Oxygen on Mars

Science fiction stories are chock full of terraforming schemes and oxygen generators for a very good reason -- we humans need molecular oxygen (O2) to breathe, and space is essentially devoid of it. Even on other planets with thick atmospheres, O2 is hard to come by.



More top stories from July.