Twin galaxies Pisces A and B give birth to stars: NASA

Q.  Two tiny galaxies drifting into cosmic wilderness for billions of years have birthed stars, according to NASA in August 2016. What are there called?
- Published on 16 Aug 16

a. Pisces A and B
b. Pisces B and C
c. Pisces C and D
d. Pisces D and E

ANSWER: Pisces A and B
Two tiny galaxies drafted in cosmic wilderness for billions of years before they started giving birth to new stars which made them visible from the earth.
  • Hubble observations suggest that galaxies called Pisces A and B spent most of their existence in Local Void, a region of the universe sparsely populated with galaxies.
  • Local Void is 150 million light years across.
  • Then they moved to give birth to the stars. In a gas rich environment, star birth may have been triggered by gas raining down on the galaxies as they plow through the denser region.
  • Dwarf galaxies are building blocks from which larger galaxies were formed billions of years ago in the early universe, inhabiting a sparse desert of empty space for most of the history of the universe, these galaxies were less active than they are today.
  • Pisces A is about 19 million light years from Earth and Pisces B is 30 million light years away.
  • Each galaxy contains 20-30 bright blue stars, indicating they are very young less than 100 million years old.
  • Less than 100 million years ago, the galaxies doubled their star formation pace.

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