Results tagged “comet”

Around 12,000 years ago, something scorched a vast swath of the Atacama Desert in Chile with heat so intense that it turned the sandy soil into widespread slabs of silicate glass.

Deep in the solar system, between Jupiter and Neptune, lurk thousands of small chunks of ice and rock.

It's suspected that about 5,000 years ago a comet swept within 23 million miles of the Sun, closer than the innermost planet Mercury. The comet might have been a spectacular sight to civilizations across Eurasia and North Africa at the end of the Stone Age.

The Dusty Remains Of Comet ATLAS

A serendipitous flythrough of the tail of a disintegrated comet has offered scientists a unique opportunity to study these remarkable structures, in new research presented today at the National Astronomy Meeting 2021.

A giant comet from the outskirts of our Solar System has been discovered in 6 years of data from the Dark Energy Survey.

The world's first ground-based observations of the bare nucleus of a comet nearing the end of its active life revealed that the nucleus has a diameter of 800 meters and is covered with large grains of phyllosilicate; on Earth large grains of phyllosilicate are commonly available as talcum powder.

A comet discovered last year is offering scientists new insights into how these objects "turn on" and evolve, as it actually transitions out of the Centaur population and into the Jupiter family of comets (JFCs), according to a paper by Planetary Science Institute Research Scientist Jordan Steckloff.

Rainbow Comet With A Heart Of Sponge

A permeable heart with a hardened facade -the resting place of Rosetta's lander on Comet 67P/Churyumov-Gerasimenko is revealing more about the interior of the 'rubber duck' shaped-body looping around the Sun.

Astrophysicists from Far Eastern Federal University (FEFU, Russia), South Korea, and the USA appear in Monthly Notices of the Royal Astronomical Society, suggesting carbon indicates time comets have spent in the Solar System -- the less carbon, the longer they have been in the proximity of the Sun.

Comet Neowise Seen From Orbit

The tiny shooting star in the lower center of this image is Comet Neowise pictured from the International Space Station as it orbited above the Mediterranean Sea in between Tunisia and Italy.

Hubble Watches Comet ATLAS Disintegrate

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.

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.

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.

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.

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.

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.

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.

The release of gases through sublimation is the defining process of comets.

Before NASA's Transiting Exoplanet Survey Satellite (TESS) started science operations on July 25, 2018, the planet hunter sent back a stunning sequence of serendipitous images showing the motion of a comet.

The atmosphere of Rosetta's comet 67P/Churyumov-Gerasimenko is far from homogeneous.

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