What is Barnard's galaxy also known as?
Q: What is Barnard's galaxy also known as?
A: Barnard's galaxy is also known as NGC 6822, IC 4895, or Caldwell 57.
Q: How far away is Barnard's galaxy?
A: Barnard's galaxy is about 1.6 million light-years away.
Q: What is the Local Group of galaxies?
A: The Local Group of galaxies is a group of galaxies that includes the Milky Way and several other nearby galaxies.
Q: Who discovered Barnard's galaxy and when?
A: Barnard's galaxy was discovered by E.E. Barnard in 1884 with a six-inch refractor telescope.
Q: What is the diameter of Barnard's galaxy?
A: The diameter of Barnard's galaxy is about 7,000 light-years.
Q: Why is Barnard's galaxy famous?
A: Barnard's galaxy is famous because it is where cepheid variables were used to find out how far away the galaxy was, settling a great debate in the 1920s about the scale of the universe and the nature of spiral galaxies.
Q: What did Edwin Hubble discover using cepheid variable stars in Barnard's galaxy?
A: Edwin Hubble found 11 cepheid variable stars in Barnard's galaxy, and used them to find the distance to the galaxy, settling a great debate in the 1920s about the scale of the universe and the nature of spiral galaxies.
