In a mesmerizing celestial event witnessed recently in the serene landscapes of Ladakh, Indian astronomer Dorje Angchuk captured and shared a stunning video of Comet Lemmon streaking across the night sky over Hanle. This rare cosmic display has captivated audiences worldwide, drawing attention not only to the comet itself but also to the breathtaking clarity of Ladakh’s night skies, renowned for their minimal light pollution and pristine conditions ideal for astronomical observation.
Dorje Angchuk, an engineer at the Indian Astronomical Observatory in Hanle, posted the video on social media, where it quickly went viral among stargazers and astronomy enthusiasts. In his post, he reflected on the contrast between the silent, ancient cosmos and the growing human presence on Earth, writing, “Even in the quiet skies of Hanle, Comet Lemmon shares its stage with the ever-growing traces of human presence.” His words and the captivating visuals together offered a poetic glimpse into the timeless wonder of the universe, reminding viewers that even in the stillness of night, the cosmos is constantly communicating through such spectacular phenomena.
Comet Lemmon itself is a relatively new visitor to public attention, having been officially discovered on January 3, 2024, by the Mount Lemmon Survey, an astronomical survey project in Arizona, USA. Since its discovery, the comet has been steadily moving through the solar system, gradually brightening as it approaches the inner regions near the Sun and Earth. According to NASA, the comet is expected to make its closest approach to Earth on October 21, 2024, followed by a perihelion—or closest approach to the Sun—on November 8, 2024.
While predicting the brightness of comets can be notoriously difficult due to their unpredictable behavior and varying activity levels, NASA remains optimistic about Comet Lemmon’s visibility. The agency has noted that the comet could become visible to the naked eye, especially as it reaches its peak brightness in late October and early November. Astronomers estimate that the comet could reach a magnitude of about 4 around October 31 to November 1, which would make it one of the more spectacular skywatching events of the season.
Initially, Comet Lemmon will be most prominent in the predawn skies until mid-October, after which it will gradually shift into the evening sky, offering opportunities for observers in various parts of the world to catch a glimpse. This transition from morning to evening visibility is typical for comets as they move along their orbits relative to Earth and the Sun.
The video shared by Angchuk showcases the comet’s striking green tail, a feature caused by the presence of diatomic carbon (C2) molecules fluorescing in the sunlight. This glowing tail, stretching like a brushstroke of starlight across the Hanle sky, is a visual treat that highlights the dynamic and transient nature of comets as they interact with solar radiation and the solar wind.
Social media responses to the video have been overwhelmingly positive, with many users expressing awe and gratitude for the opportunity to witness such a rare event. Comments ranged from admiration of the comet’s beauty to appreciation for Ladakh’s pristine skies. One user remarked, “So beautiful! Weather has not been kind for us. How long will it be visible?” reflecting a common sentiment among skywatchers eager to catch the comet before it fades from view. Another user praised Angchuk’s efforts, saying, “Really amazing, sir, well done!” while a third captured the emotional connection many feel with Hanle, commenting, “Anyone who has been to Hanle will always have the magic etched in their hearts forever.”
Hanle, situated at an altitude of about 4,500 meters in the eastern Ladakh region, is home to the Indian Astronomical Observatory, one of the highest and most remote astronomical observatories in the world. Its location offers exceptional conditions for astronomy, with clear skies free from city light pollution, low humidity, and minimal atmospheric disturbances. These factors make it an ideal spot not only for professional astronomers but also for enthusiasts hoping to witness spectacular astronomical phenomena like Comet Lemmon.
Through Angchuk’s lens, the world has been given a rare opportunity to connect with the cosmos in a deeply personal way. The video serves as more than just documentation of a comet’s passage; it is a reminder of the vastness, beauty, and ongoing dynamism of the universe that surrounds us. Moments like these inspire curiosity,