Search results for comets

Planetary Sciences Dec 12, 2023

Halley's comet is finally headed back to the sun: When you can see it

The most famous comet of all is headed back toward Earth. Halley's comet reached aphelion—its farthest point from the sun—on Dec. 8, at which point it began its long journey back to the sun.

Astronomy Dec 7, 2023

Famed Halley's comet passes aphelion this weekend

It's lonely out there in the frozen outer solar system. On Saturday, December 9th, that most famous of all comets 1P/Halley reaches a hallmark point on its 75-year journey through the solar system, reaching aphelion or its ...

Astrobiology Nov 14, 2023

'Bouncing' comets could deliver building blocks for life to exoplanets

How did the molecular building blocks for life end up on Earth? One long-standing theory is that they could have been delivered by comets. Now, researchers from the University of Cambridge have shown how comets could deposit ...

Planetary Sciences Nov 14, 2023

Testing of citizen scientist discovery suggests it is on the boundary between comet and asteroid

A team of space scientists, astronomers and astrophysicists affiliated with multiple institutions across the U.S., working with a colleague from Italy, has determined that a celestial object spotted by citizen scientists ...

Astronomy Nov 7, 2023

A new trail to exoplanets: Team successfully detects ammonia isotopologues in atmosphere of cold brown dwarf

They reveal the origin of wine, the age of bones and fossils, and they serve as diagnostic tools in medicine. Isotopes and isotopologues—molecules that differ only in the composition of their isotopes—also play an increasingly ...

Astronomy Nov 3, 2023

Hubble provides unique ultraviolet view of Jupiter

This newly released image from the NASA Hubble Space Telescope shows the planet Jupiter in a color composite of ultraviolet wavelengths. Released in honor of Jupiter reaching opposition, which occurs when the planet and the ...

Astronomy Oct 18, 2023

Comet Encke and the Halloween Fireballs of 2023

October and November are always great months to watch for meteors, and 2023 is no exception. This year provides a special reason to be vigilant, as the source of the November Taurid Fireballs Comet 2P Encke reaches perihelion ...

Archaeology Oct 4, 2023

A prehistoric cosmic airburst preceded the advent of agriculture in the Levant

Agriculture in Syria started with a bang 12,800 years ago as a fragmented comet slammed into the Earth's atmosphere. The explosion and subsequent environmental changes forced hunter-gatherers in the prehistoric settlement ...

Astronomy Sep 11, 2023

A medieval manuscript likely hides a record of an impending recurrent nova

Approximately every 80 years, a faint 10th magnitude star in the constellation of Corona Borealis dramatically increases its brightness. This star, T CrB, is known as a recurrent nova and last flared in 1946, peaking at magnitude ...

Space Exploration Sep 7, 2023

Across the Northern Hemisphere, now's the time to catch a new comet before it vanishes for 400 years

A newly discovered comet is swinging through our cosmic neighborhood for the first time in more than 400 years.

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