The information was announced by The Astronomer’s Telegram, reports Science Alert. According to these media, a new brilliant light has just formed in the constellation Cassiopeia. This is the result of a star exploding. The glow is so intense that it can be seen from Earth in the night sky through a telescope or even binoculars.
The transitional event was first spotted on the night of March 18 by an amateur Japanese astronomer named Yuji Nakamura. Namakura lives in the Japanese city of Kameyama and was quick to report his discovery to the National Astronomical Observatory of Japan.
A classic nova
Thanks to the Seimei telescope at Kyoto University, astronomers at NAOJ and Kyoto University were able to quickly confirm that it was a nova. Since then, the phenomenon has been given the informal name Nova Cassiopeia 2021 and an official name: V1405 Cas.
Experts say the remaining glow from the explosion should be visible in the northern hemisphere for the next few days. It turns out that Nova Cas 2021 is a classic Nova. This means that it is – at least on a cosmic scale – a small explosion caused by flammable interactions within a binary star system.
The result of a fusion reaction
The binary system responsible for the nova in question would consist of a normal star and a white dwarf. In such a system, due to the extremely high density and thus the intense gravitational force of the white dwarf, it is able to tear off gaseous matter from its partner.
The nova (left) and the same image of the sky four days ago. Photo credit: Yuji Nakamura / NAOJ
Then a fusion reaction occurs when the accumulation of gas reaches a certain temperature, which is triggered after the nova. Scientists believe this is what caused the V1405 Cas phenomenon.
At the moment, experts do not yet know which system Nova Cassiopeia 2021 belongs to. This is mainly due to the fact that the event took place very far from Earth. However, it is likely that it took place within the CzeV3217 binary system, which is 5,500 light years from Earth.
If you want to watch the glow, you know that it is visible on the right ascent 23h 24m 48s, declination + 61 ° 11 ′ 15. Don’t worry if for some reason you can’t see it! In fact, the novas are fairly common natural phenomena.