- The scientists at the Aryabhatta Research Institute of Observation Science (ARIES) has found dwarf galaxies that are forming new stars at the rate of 10-100 times more than that of Milky Way Galaxy.
- This however, according to the scientists do not last longer than a few tens of million years.
HIGHLIGHTING ISSUES AND KEY CONCEPTS:
- These dwarf galaxies according to the scientists last only for few billion years. Also, the formation of new stars in these galaxies also happen for a very short duration which is a few million years. The scientists used the following telescopes to make these observations
- Devasthal Fast Optical Telescope at Nainital
- Giant Meter Wave Radio Telescope
- The scientists have found that the star formation at high rate requires high density of hydrogen in the galaxies.
- The hydrogen in these short living small galaxies is very minimal. On the other hand, in a well defined galaxy, the hydrogen distribution is symmetrical.
- Also, hydrogen in these dwarf galaxies are in the form of isolated clouds, tails, plumes.
X-RAY POLARIMETER (SATELLITE):
It is a planned space observatory satellite that is to be launched in 2021. The telescope is developed by the Indian Space Research Organization. The satellite is to study cosmic X-rays.
TELESCOPES PRESENT IN INDIA:
- Indian Astronomical Observatory, Hanle
- It is the world second highest observatory located in Ladakh
- It is operated by Indian Institute of Astrophysics, Bengaluru
- Kodaikanal Solar Observatory, Kodaikanal, Tamil NAdu
- Udaipur Solar Observatory, Udaipur
- It is located on an island in Fateh Sagar Lake
- The observatory was built in lines of the solar observatory at Big Bear Lake, Southern California.
- Vainu Bappu Observatory, Kavalur
- AERIES Observatory, Nainital
MACE(MAJOR ATMOSPHERIC CHERENKOV EXPERIMENT):
- The world highest and India’s largest telescope gamma ray telescope MACE is in Ladakh.
- It is placed at an altitude of 4,300 metres above the sea level. It is the world second largest ground based gamma-ray telescope.
