The brightest comet in the night sky right now makes its closest approach to the sun Monday (Jan. 3) and — even if it survives the journey — that will be the only time the comet sees our star close up.
That icy wanderer is Comet Leonard, which got brighter unexpectedly in late December as it drew closer to the sun, according to EarthSky. Skywatchers even had a chance to see the comet and planet Venus in the same binocular view as Leonard made its closest approach to Venus on Dec. 17.
Comet Leonard, also known as comet C/2021 A1, was discovered on Jan. 3, 2021 and is a great target for amateur astronomers. If you're looking for a telescope of binoculars to objects like it, check out our guide for the best binoculars deals and the best telescope deals on right now. Our best cameras for astrophotography and best lenses for astrophotography guides also have tips on how to pick the best imaging gear to snap photos.
Want to see Comet Leonard? Here are telescope and binoculars recommendations
Leonard's perihelion — or closest approach to the sun in its orbit — coincidentally takes place just hours before Earth's own perihelion on Tuesday, Jan. 4, at 1:52 a.m. EST (0652 GMT). But Leonard's journey will be a much more of a close approach than that of the Earth's.
The comet will approach our sun at a distance of roughly 56 million miles (90 million kilometers), which is about half that of Earth's distance to the sun. Leonard will have to survive the sun's intense gravitational force at that distance, along with the solar wind. So like many other comets making that close swing by the sun, there's a risk Leonard may fall apart. But even if the comet survives the journey, NASA said in a statement, "its trajectory will fling it into interstellar space, never to return."
NASA notes that Leonard made a 40,000-year journey to our sun from the outer solar system, but the comet was only discovered on Jan. 3, 2021 – just one year before perihelion.
"That is strictly coincidental, but I like coincidence," comet discoverer Gregory Leonard, a senior research specialist at the University of Arizona's Lunar and Planetary Laboratory, told Space.com in December.
Editor's Note: If you snap an amazing comet or night sky picture and would like to share it with Space.com readers, send your photos, comments, and your name and location to email@example.com.
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Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for Space.com for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: https://qoto.org/@howellspace