Indian Astronomers discover the farthest star galaxy
India’s first multi-wavelength satellite “Astrosat” detected extreme Ultra Violet light from a galaxy located 9.3 billion light years away from the earth. The galaxy is called AUDFs01.
India was able to achieve the discovery as the background noise in the UVIT detector of the satellite is very less. It is lesser than that of the Hubble Space Telescope.
UVIT is Ultra Violet Imaging Telescope. It weighs 230 kg. It has a spatial resolution of 1.8 arc seconds. The UVIT is a suite of far ultra violet, near ultra violet and visible band. Far Ultra Violet lies in the band of 130 to 180 nm. The Near Ultra Violet lies in the band of 200 to 300 nm and visible band lies in the band of 320 to 550 nm.
Hubble Space Telescope
The telescope was launched in 1990. It is one of the largest space telescopes. It was launched by the Space Shuttle Discovery in 1990. It is the only telescope designed to be serviced in space by astronauts.
The successor to Hubble Space Telescope is James Webb Space Telescope which is to be launched in 2021.
Spitzer space telescope of NASA was recently switched off in January 2020. It was launched in 2003. The telescope revealed new ring around planet Saturn. Also, in 2017, the telescope revealed the presence of seven rocky planets around TRAPPIST-1 star.
Recent discovery of Hubble
On September 1, 2020, NASA revealed that the Halo in Andromeda Galaxy is much more massive than expected. The researchers have found that Halo stretched much farther in space extending 1.3 million light years out of the galaxy. According to the researchers, Halo covers more than half the distance between Andromeda and the Milky Way.
The Halo was discovered by Project AMIGA (Absorption Map of Ionized Gas in Andromeda).
Halo is nothing but a huge envelope of gas.