Search results for comets

Astronomy Nov 29, 2021

New study shows the largest comet ever observed was active at near-record distance

A new study by University of Maryland astronomers shows that comet Bernardinelli-Bernstein (BB), the largest comet ever discovered, was active long before previously thought, meaning the ice within it is vaporizing and forming ...

Astronomy Nov 29, 2021

Comet A1 Leonard brightens in December

Now is the time to start tracking Comet C/2021 A1 Leonard, as it starts its dawn dive sunward.

Astronomy Nov 24, 2021

New findings about ions around comets

Sofia Bergman, Swedish Institute of Space Physics (IRF) and Umeå University, will defend her doctoral thesis on low-energy ions around comet 67P/Churyumov-Gerasimenko on 26 November. Observing low energy ions is notoriously ...

Condensed Matter Nov 3, 2021

Laboratory will illuminate formation, composition, activity of comets

Comets are icy and dusty snowballs of material that have remained relatively unchanged since they first formed billions of years ago. Studying the small bodies provides clues about the formation of the solar system.

Astronomy Nov 3, 2021

Mysterious comet has been having multiple large outbursts

Amateur and professional astronomers have found that the comet 29P/Schwassmann-Wachmann has been experiencing an unusually large outburst recently. Normally, it has little outbursts spread throughout the year.

Earth Sciences Nov 2, 2021

Vast patches of glassy rock in Chilean desert likely created by ancient exploding 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. Now, a research team studying the distribution ...

Space Exploration Oct 29, 2021

Proposed Centaur mission could catch comets in the act of formation

From Mercury to the depths of the distant Kuiper Belt, there aren't many unexplored corners of the solar system out there. One class of object, however, remains to be visited: the transitional Centaurs out beyond the orbit ...

Earth Sciences Oct 21, 2021

How asteroid, comet strikes may have delayed evolution of the atmosphere

Between 2.5 and 4 billion years ago, a time known as the Archean eon, Earth's weather could often be described as cloudy with a chance of asteroid.

Astronomy Oct 15, 2021

The biggest comet ever seen will get as close as Saturn in 2031

A mega-comet—potentially the largest ever discovered—is heading from the Oort Cloud towards our direction. Estimated to be 100–200 kilometers across, the unusual celestial wanderer will make its closest approach to the Sun ...

Planetary Sciences Oct 13, 2021

To watch a comet form, a spacecraft could tag along for a journey toward the sun

Deep in the solar system, between Jupiter and Neptune, lurk thousands of small chunks of ice and rock. Occasionally, one of them will bump into Jupiter's orbit, get caught and flung into the inner solar system—towards the ...

page 22 from 40