Planetary nebula NGC 2022, positioned within the constellation of Orion (The Hunter), as imaged by the Hubble Area Telescope. The picture was first launched on 12 August 2019. ESA/Hubble & NASA, R. Wade
This picture would possibly appear to be a deep-space jellyfish, however it’s not an indication of extraterrestrial life — in actual fact, it’s a planetary nebula referred to as NGC 2022, positioned within the constellation of Orion (The Hunter), which has been captured by the Hubble Area Telescope.
A planetary nebula is, fairly confusingly, nothing to do with planets. It’s named that as a result of when astronomers first noticed these blobs within the sky with early telescopes, they thought that they had been planets due to their spherical shapes. A planetary nebula is definitely fabricated from gasoline which has been ionized, making it glow and creating an increasing shell which pushes out into house. Such a phenomenon happens when a purple large star reaches the tip of its life and begins to eject gasoline, which varieties the nebula.
Planetary nebulae are a subtype of emission nebulae, that are clouds of gasoline which are ionized by mild emitted by a close-by star. Within the case of NGC 2022, you’ll be able to see the star shining brightly on the coronary heart of the nebula. This star was as soon as like our Solar, however because it aged it grew larger and started to glow purple, changing into a purple large.
When a star turns into a purple large, its outer layers of gasoline and different supplies are steadily stripped away, being misplaced into house. This course of can deplete a big a part of the star’s materials, with as much as half a star’s mass being misplaced. That is what causes the outer shell of gasoline to type. Whereas that is occurring, the dense core of the star can be shrinking and changing into hotter. The dense, sizzling core emits ultraviolet mild which illuminates the gasoline shell, creating the gorgeous nebula impact.
NGC 2022 is close by and vibrant sufficient that it may be noticed even with novice telescopes. It seems as a small patch of gray mild, with an obvious measurement of zero.65 arcminutes. It’s positioned 1.eight levels southeast of the luminous class O star Meissa (Lambda Orionis), within the northern a part of the Orion constellation.