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Read news from the world of astronomy for the week of January 20, 2023.
Latest News
A supernova that skywatchers in the Far East observed almost 850 years ago has produced a most unusual remnant.
The James Webb Space Telescope has confirmed its first exoplanet, a rocky Earth-size planet.
Astronomers have discovered that one of the Milky Way’s nearest galactic neighbors has dramatically changed in the recent past.
An arc that glows green thanks to doubly ionized oxygen appears near the Andromeda Galaxy.
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Observing Highlights
Around 8 or 9 p.m., Sirius shines precisely below Betelgeuse in the southeast. Continue the line from Betelgeuse through Sirius on down, and it runs right along Canis Major's back to Delta Canis Majoris, or Wezen.

Forget the hype and go outside to enjoy the real thing — a relatively bright comet you can see in binoculars from a dark sky.
If you have a solar filter, check out the sunspot group AR 3190 that’s crossing the solar disk this week.
For those well north of the equator, January’s long nights provide lots of time to enjoy the starry sky — and the stars of winter are spectacular!

Community
Hamptons Observatory and Suffolk County Community College present a free, virtual lecture on February 2nd by Paul Andrew Mayewski.
The average brightness of the night sky is increasing 10% every year, making the stars less visible.