
After a hiatus spanning seven decades, the well-known Devil Comet has made its grand reappearance in the night sky above Australia.
The devil comet is dubbed as 12P/Pons-Brooks, a periodic comet in our solar system that was discovered independently by astronomers Jean-Louis Pons and William Robert Brooks. The designation "12P" indicates that it was the 12th periodic comet to be discovered.
This comet follows an elliptical orbit around the Sun, and it has a periodicity of about 71.5 years. Its last perihelion passage (closest approach to the Sun) occurred in 2018.
Comet Pons-Brooks is part of the Jupiter family of comets. This means its orbit is influenced by Jupiter's gravity. When it approaches the inner solar system, it can become visible from Earth, sometimes even with the naked eye, depending on its brightness and proximity to our planet.
Also Read |Hubble's latest marvel: Twin Jet Nebula stuns everyone!
Like many comets, 12P/Pons-Brooks consists of ice, dust, and rocky material. As it gets closer to the Sun during its orbit, the heat causes the ice to vaporise, creating a glowing coma (the comet's atmosphere) and a tail that points away from the Sun due to the solar wind.
Also Read |Garbage to fuel aviation of future? Researchers show way for sustainable skies
Measuring nearly 34 kilometres in diametre at its core, this comet, characterised by its hue, is sometimes compared with Halley's comet.
Astrophysicist Brad Tucker of the Australian National University reportedly noted the current challenge in spotting the Devil comet. He anticipates its visibility to improve gradually over the next week as it approaches the sun, reaching its pinnacle brightness on April 22.
Watch | Study says climate change to shrink global GDP by $38 trillion by 2050
As the comet journeys closer to the sun, its cryovolcanic nature becomes apparent, spewing water vapour and other materials from its core. This activity, alongside its diatomic carbon composition, contributes to its unique greenish hue. Comets like these are now understood as remnants from the dawn of the solar system, composed of ice and dirt, often referred to as "dirty snowballs."
(With inputs from agencies)