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 16a. 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.
