Skywatchers: The Green Comet is back after 50,000 years 

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The Green Comet is being tracked by astronomers and space scientists as it moves closer to us in the solar system. It has two tails which developed when it was in close proximity to the Sun. 

At times the tails can appear to merge together. One of them is the dust tail which tends to appear broad and curved. The other tail is called the plasma or ion tail and is made up of gasses. It is thin and straight and typically points away from the sun.

The Green Comet appears to glow. This brightness is due to sunlight reflecting and refracting off the dust and gas in the tails.

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Both tails connect to the main body which is also known as the head of the comet. And the presence of the chemical diatomic carbon causes it to glow green.

How did C/2022 E3 (ZTF) get its name?

Comets are named by rules set up by the International Astronomical Union.

  • C/ refers to a non-periodic comet, which means it it takes over 200 years tocomplete its orbit. And it has never been observed before.
  • 2022 is the year of discovery.
  • E indicates the half-month when the comet was discovered. (The first half of January is A, the second half is B, so the first half of March is E.)
  • The 3 means it was the third comet discovered in the first half of March.
  • ZTF tells us who made the discovery. Or in this case which telescope.The Green Comet was discovered by a sky scanning  camera mounted on a telescope known as Zwicky Transient Facility. ZTF is located at the Palomar Observatory in California.