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A pair of once-in-a-lifetime comets are hurtling across our skies right now, which is rare because they won’t return for hundreds of years. Comets C/2025 A6 (Lemon) and C/2025 R2 (Swan)they look similar.
You can now see these green balls of gas and their streaming tails, as SWAN shone brightest on Monday, October 20. NBC News Reports. Just one day later, on Tuesday, October 21, Lemon will reach its peak in the dark sky.
You’ll be able to see a lemon without any equipment, but the SWAN will be very faint, he says Jason Stephenassistant professor of physics and astronomy at UNLV.
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“Current models show that Comet Lemmon will likely peak at between 3.5 and 4.5 degrees when it is closest to Earth on October 21, which is less bright than it showed last week.” St. Louis Science Center Written in the update. “This is still bright enough that it can be seen with the naked eye from light-polluted locations.”
CNN reports that SWAN will come again in 650 to 700 years, and Lemmon will not return for another 1,300 years.
“Comet Lemmon is called a non-periodic comet,” says Stephen. “Unlike Halley’s Comet, which comes every 76 years, the orbit of a non-periodic comet is actually very elliptical.” “The last time I was here was in the 1970s.”
Comets are known to defy even the most accurate predictions, but careful observers may catch these rare October sightings from their backyards in the early morning or in the night sky.
New comets on the scene
Both Lemmon and SWAN were discovered in 2025. Lemon discovered On January 3 in Arizona by the Mount Lemmon Survey using a 60-inch telescope mounted on Mount Lemmon to find the celestial bodies, which gave the comet its name.
A Ukrainian amateur astronomer named Vladimir Bezugli discovered comet SWAN on September 11 while looking at images taken by SWAN, a scientific instrument called Solar Wind ANisotropies, which was mounted on the Solar and Heliospheric Observatory in space.
“It was an easy comet to detect due to sufficient brightness in the (ultraviolet) band and the location in the SWAN images, exactly at its center,” Pizzogli said. The universe today. He also noted that it is the twentieth official SWAN comet to date.
How do you see Lemon and Swan this month?
The darker the night sky, the easier it is to see comets, moons, planets and stars. If you live in a city, pack your bags and take an evening sky-watching trip to the countryside, where there is less light pollution. Oh, and get blankets and chairs and something warm to drink.
It takes some time for your eyes to adjust to the dark. Find a comfortable place where you can stay still and look up. Comets may be bright enough to be seen unaided, however NASA recommends binoculars As a great entry-level stargazing tool.
Telescopes are one of the best ways to view the sky, and you may be able to find one to use or rent at your local library or university. but Modern telescopes can also be fairly affordable.
Smartphone Apps can also be useful when trying to learn about celestial phenomena and where to find them. For some recommendations, check this out Our list of stargazing apps.
A sky full of wonders
Aside from newly discovered comets, skywatchers have some other cosmic goodies to enjoy this month.
the Orionides meteor showerwhen Earth began moving through the massive tail of Halley’s Comet, earlier this month, but you will be able to see meteors until the beginning of November.
the next SupermoonKnown as Beaver Moon, it will happen on November 5.