What did a team led by Indian astronomers find about the galactic open cluster UBC 63?
- A.It is the nearest open cluster to the Sun
- B.It is actually two distinct clusters that passed close to each other
- C.It hosts the first planet found outside the Milky Way
- D.It is merging with the Andromeda galaxy
Show answer
The group, which lies about 4892 light years away and had been treated in the limited earlier literature as a single cluster, was found to hold two separate stellar populations, now named UBC 63A and UBC 63B. Their brightness and colours formed two sequences in the colour magnitude diagram, and…
Read the full explanation →