comets

Comet Lovejoy (2011). Illustration: depositphotos.com

A new comet may be visible in April 2026 if it survives an extremely close pass near the Sun

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Halley's Comet, supposedly in 1758.

The name “Hallie’s Comet” may belong to someone else: Study suggests 11th-century monk identified the periodicity before Edmond Halley

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According to an analysis by researchers at Leiden University in the Netherlands, evidence in medieval chronicles indicates that the monk Aylmer of Malmesbury linked observations in 989 and 1066 to the same periodic comet—hundreds of years before Halley established
This is a Hubble Space Telescope image of the interstellar comet 3I/ATLAS. Hubble captured the comet on July 21, 2025, when the comet was 365 million kilometers from Earth. Credit: NASA, ESA, D. Jewitt (UCLA) Image processing: J. DePasquale (STScI)

Guest Comet Atlas: Physicists Unravel “Message in a Bottle” from Interstellar Space

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Researchers from Auburn University have identified a unique ultraviolet signature of water in the interstellar comet 3I/ATLAS.
Interstellar comet 3I/ATLAS on 11-26-2025. Photo: Gemini North Observatory, NOIRLab

Color images reveal greenish glow of interstellar comet 3I/ATLAS

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Live observations on the program Shadow the Scientists show a change in the comet's color after its close approach to the sun, likely due to gases in the comet emitting green light.
A photograph of Comet i3/Atlas from Mars orbit.

NASA Sums Up Interstellar Comet 3I/ATLAS Passage: A “Frozen Fossil” from an Alien Solar System

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A fleet of spacecraft and telescopes – from Hubble and James Webb to spacecraft orbiting Mars – tracked comet 3I/ATLAS, the third to reach us from outside the solar system, and discovered a composition and geometry different from local comets but
Discovered in early July, Comet 3I/ATLAS is only the third interstellar object to pass through the solar system. Scientists are tracking its motion and believe it is a rare opportunity to learn about planetary conditions in distant solar systems. (Image credit: NASA/JPL-Caltech)

The Solar System as a Crossroads – A Third Comet from Another Solar System Discovered

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Comet 3I/ATLAS, discovered in early July, is only the third interstellar object to pass through the solar system. Scientists are tracking its motion and believe it is a rare opportunity to learn about planetary conditions in distant solar systems.
A comet at night above an observatory with stars and a figure observing.

Don't blink – the stunning Comet Atlas is breaking up before our eyes

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This artist's impression shows NEO Surveyor in deep space. Credit: NASA/JPL-Caltech

NEO Surveyor Mission: NASA's Pioneering Planetary Defense Effort

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Comet C/2023 A3 (Tsuchinshan-ATLAS) in the skies of Israel. Photography: Ilan Shapira

There are only a few days left to watch the Zuchinshan-Atlas comet in the evening sky (streaming recording)

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The comet discovered at the same time by two automatic stargazers and named after both is extremely bright. It will return to Earth's proximity only in 80 thousand years
Artist's impression of a protoplanetary disk. Credit: ESA

The Webb Space Telescope finds an abundance of carbon molecules around a young star

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"It's amazing that we can detect and quantify the amount of molecules we know very well on Earth, like benzene, which is actually more than 600 light-years away," said one of the authors of the paper that appeared.
Illustration of the crater created during the collision between the DART spacecraft and the Dimorphos asteroid. In the background: the European HERA spacecraft and its nanosatellites (CubeSats) in follow-up research. Credit: ESA Science Office

repel the asteroid

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Technion researchers are partners in the HERA space mission: first attempt in history to divert an asteroid from its orbit
This figure illustrates how an interstellar object is rapidly approaching our solar system. Ejected from its home planet system long ago, the object traveled through interstellar space for billions of years before passing briefly in our cosmic neighborhood. The Robin Observatory will reveal many of these unknown interstellar visitors.

Visitors from distant stars: The Rubin Observatory will detect a multitude of interstellar objects moving through our solar system

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The Vera Rubin Observatory's Legacy Survey of Space and Time (LSST) will revolutionize solar system science by discovering a population of previously undiscovered interstellar comets and asteroids passing through the neighborhood
NASA image showing the comet's predicted path in late January and early February. Credit: NASA

The Green Comet C/2022 E3: How to watch the rare visitor

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Green Comet C/2022 E3 (ZTF) will approach Earth on February 1st and, although pale in the northern sky, will be seen near the carts/bears before sailing into deep space for millions of years if at all
Comet NEOWISE as photographed from the Parker spacecraft, on July 5, 2020, when it reached the closest point in its orbit to the Sun. Photo: NASA

Starting this week, comet NEOWISE can be observed in the evening hours

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Comet Borisov, at its closest point to the Sun, December 2019. Photo: Hubble Space Telescope

The interstellar comet Borisov passed the Sun and accelerated

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comet. Illustration: shutterstock

A newly discovered comet is likely a visitor from outside the solar system

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Trees felled by the Tunguska asteroid strike in 1908 as photographed by a Russian expedition in 1929. From Wikipedia

Astronomers will search the tauroid swarm for bodies the size of the asteroid that crashed into Tongska

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An artist's impression of the first interstellar asteroid Oumuamua, a unique object discovered on October 19, 2017 by the Pan-STARRS telescope in Hawaii. Image: NASA

The cigar-shaped object that arrived outside the solar system is an extinct comet, not an asteroid or an alien spacecraft

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Simulation of the Dragonfly mission proposal - a rover will explore the surface of Titan, and will land after each flight to explore the surface and charge its batteries using a thermoelectric radioisotope generator (RTG). Source: NASA.

A rover to Titan's moon or collecting a sample from Rosetta's comet - which will NASA choose?

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Comet P67. Photographed by the Rosetta probe on July 7, 2015 from a distance of 154 km. Source: ESA/Rosetta/NAVCAM.

Comet 67P studied by the Rosetta spacecraft: summary of findings

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comet. Illustration: shutterstock

My life as a comet hunter

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Caroline Herschel. From Wikipedia

Caroline Herschel acquired an education despite her mother's opposition, helped her brother William and recorded astronomical discoveries herself

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The nucleus of comet 67P Churyumov-Garasimenko was 5 km in diameter. Photo: European Space Agency

A surprise in the findings of the Philae comet lander: complex organic materials

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Asteroid attack on Earth and Moon. Illustration: shutterstock

Oceans from the sky / David Jewitt and Edward D. Young

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Eight observations after a space rock hit Jupiter on July 19, 2009. Photo: NASA/JPL-Caltech/IRTF/STScI/ESO/Gemini Observatory/AURA/A. Wesley

Comet and asteroid impacts on the planet Jupiter after the great Shoemaker-Levy 9 impact on Jupiter in 1994

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Comet Lovejoy as imaged by the Deep Space Telescope Camera in Chile. Photo: MARTY MURPHY, NIKOLAY KUROPATKIN, HUAN LIN, AND BRIAN YANNY/FERMILAB

A deep space camera photographed Comet Lovejoy in all its glory

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Two objects with comet-like orbits passed through the solar system in 2013 and 2014, but showed no activity. On the left is C/2013 P2 Pan-STARRS and on the right is C/2014 S3 Pan-STARRS. Photo: Institute of Astronomy, University of Hawaii.

"Naked" comets may reveal the secret of the origin of the solar system

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A close-up of the nucleus of comet 67P Churyumov-Gardimenko. Photo: European Space Agency's Rosetta spacecraft, August 6, 2014

Rosetta entered orbit around the comet and thus sets a historical landmark

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This image of the halo of Comet 67P Churyumov-Gardimenko was taken on July 25, 2014 and covers an area of ​​150 km by 150 km. Photo: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM

In less than a week, Rosetta will begin orbiting the comet; photographed our discovery from a distance of 2,000 km

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Comet Jacques and the Agalon Group Nebula IC 405, also known as the Burning Star Nebula, aligned and formed a temporary question mark in the sky on the morning of July 26. Photo: Rolando Lagostri

Comet Jacques created a question mark in the sky

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Comet 67P/CG as photographed on July 14, 2014 from the Rosetta spacecraft from a distance of about 12 thousand km. Photo: Credits: ESA/Rosetta/MPS for the OSIRIS team

Rosetta approaches an unusual comet

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An artist's rendering illustrates the model that explains Alma's observations of the star Beta Pictoris. At the outer edge of the system we feel the gravitational influence of a hypothetical giant planet that captures comets and turns them into a swarm where collisions occur all the time. Image: NASA Goddard Space Flight Center/F. Reddy

Get to know the solar system where comets collide every five minutes

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The remains of Comet Ison, as photographed by the Soho spacecraft of NASA and the European Space Agency the day after perihelion.

Astronomers: There is still hope that some fragments from the nucleus of Comet Ison survived the passage

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Comet Ison and the planet "Hama" in the early morning just before sunrise in the sky of the Canary Islands, Spain.

Comet Ison is already visible in the morning, will we see it in the evening from Thursday?

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Comet Ison as photographed by the amateur astronomer Michael Jaeger from Austria. Photo: from the NASA website

What is the expected fate of Comet Ison in the next two weeks?

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Solar System. Illustration: shutterstock

Mathematical calculations for discovering planets - is history repeating itself these days?

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Tag of an airborne mission to track the Dragonids in 2011

A ton of material was added to the Earth in one meteorite meter

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This computer graphic depicts the path of comet 2013 A1, (Siding Spring) through the inner solar system. Photo: NASA\JPL-Caltech

New calculations rule out the possibility of the comet hitting Mars in 2014

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Comet 2013 A1 near Mars, wrapping its tail around it. Forecast for the event that will take place in October 2014. Image: NASA

Collision path: A comet makes its way towards Mars

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Guessing where to locate the PanSTARRS comet on March 12, 2013 after sunset. Illustration: David Atkinson, Universe Today

Comet Fanstars continues to move north, today may be visible from Israel for a short time after sunset with the naked eye

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Photo: The path of the comet in the western sky about an hour after sunset at latitudes 30 north in the week between the 8th and the 16th of March (also relevant to Israel).

A guide to watching Comet Fanstars in March 2013

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Artist's impression of the Oort cloud and the Kuiper belt. Image: NASA

A comet that will pass next month may be visible to the naked eye

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An image created using Starry Night software shows what Comet ISON will look like in the evening sky after sunset on November 29, 2013 from the UK

The bright comet Ison may provide a celestial display in about a year - if it does not disintegrate near the sun

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Comet Temple-1 as photographed from the Stardust spacecraft, 2011

The return to Comet 1 Temple

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Comet Alanin disintegrates, as photographed by its discoverer Leonid Alanin on October 6, 2011. Courtesy UNIVERSE TODAY

The end of the world has not come again: Comet Alanin passed at a distance of 35 million km from the Earth

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Comet Alanin

The end of the world is closer than you thought!

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A comet is approaching the sun. Image: NASA

Is a giant planet at the edge of the solar system responsible for some of the comets?

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One of the comets discovered by SOHO is Comet 96P Machholz. It orbits the sun once every six years and Soho saw it three times

Soho celebrates 15 years in space and discovers the Comet of the Millennium

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This sharpened image, taken on November 4, 2010 as the Epoxy spacecraft approached Comet Hartley 2, reveals a cloud of ice particles surrounding the comet's active nucleus.

Snow on Comet Hartley 2

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Comet Hartley 2 as seen from Earth through telescopes on October 13, 2010

Prospects for meteorites following the passage of Comet Hartley 2

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