Matt McIrvin on Nostr: Astronomers once believed that Sirius was part of the Ursa Major Moving Group, but ...

Astronomers once believed that Sirius was part of the Ursa Major Moving Group, but it's too young to be physically associated with the rest of them. Menkalinan (Beta Aurigae) and Alphecca (Alpha Coronae Borealis) are in it though.