The James Webb Space Telescope (JWST) observed Sedna, a dwarf planet in the Kuiper Belt, using its Near-Infrared Spectrometer (NIRSpec). The observations were made on September 13, 2022. 

Sedna is one of the farthest known dwarf planets in the solar system. It has a diameter of approximately 800-1100 miles. 

The observations revealed several interesting things about Sedna’s orbit and composition, including: 

• Light hydrocarbons 
• Complex organic molecules 
• Abundant ethane (C2H6) 
• Acetylene (C2H2) 
• Ethylene (C2H4) 

The observations were led by Joshua Emery from Northern Arizona University. 

Studying bodies in the outer Solar System is one of the many objectives of the James Webb Space Telescope (JWST). Using data obtained by Webb’s Near-Infrared Spectrometer (NIRSpec), an international team of astronomers observed three dwarf planets in the Kuiper Belt: Sedna, Gonggong, and Quaoar.

When was the Kuiper Belt discovered?

1951: Astronomer Gerard Kuiper predicts the existence of a belt of icy objects just beyond the orbit of Neptune. 1992: After five years of searching, astronomers David Jewitt and Jane Luu discover the first KBO, 1992QB1.

Who predicted the Kuiper Belt?

However, it was not until 1980 that astronomer Julio Angel Fernandez published a paper suggesting the existence of a comet belt beyond Neptune, which could serve as a source for short-period comets. Although the Kuiper belt is named after Gerard Kuiper, Fernandez was the researcher who first predicted its existence.

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