New year starts with the XPoSat launch by ISRO
ISRO's XPoSat mission launched. Satellite installed in 650Km orbit after 21 minutes, it will study black holes-neutron stars. X-ray Polarimeter Satellite (XPoSat) was launched today i.e., January 1 at 09:10 am from Satish Dhawan Space Center, Sriharikota. XPoSat has two payloads, Pollux and Expect, for the study of black holes and neutron stars. After 21 minutes, they were placed in an orbit 650 km above the Earth.
Amar Chand Jajda 
It is also India's first and the world's second polarimetry mission after NASA's Imaging X-ray Polarimetry Explorer (IXPE), launched in 2021.
Apart from this, payloads of space tech startup Dhruv Space, Bellatrix Aerospace, TM2Space have also been sent with the PSLV rocket. A total of 10 payloads have been sent with this rocket.
Fourth stage brought into 350 Km orbit
After placing the satellite in an orbit of 650 km, its solar panels were opened to generate power. The fourth stage of the rocket was brought into Earth's orbit of 350 km. This will be used as PSLV Orbital Experiment Module.
Bring down the fourth stage to avoid garbage
ISRO Chairman S Somnath said that the fourth stage of the rocket could have been placed 650 km above for experiments, but this would have created debris in space. For this reason, we brought the fourth stage into an orbit of 350 km, so that it would be destroyed after the experiment.
Regarding this year's missions, he said that 2024 will be the year of Gaganyaan. This year, there will be 2 test flights of Gaganyaan mission, after which an unmanned mission has been planned. Apart from this there are many other missions. This year is going to be very hectic for ISRO.
Study of radiation of black holes and neutron stars
XPoSat aims to study the radiation emitted from various astronomical sources like black holes, neutron stars, active galactic nuclei, pulsar wind nebula etc. They are formed through very complex physical processes and understanding their emissions is quite challenging.
NASA launched X-ray Polarimetry Explorer in 2021
NASA's Imaging X-ray Polarimetry Explorer (IXPE) is NASA's first mission to study the polarization of X-rays from many different types of astronomical objects. It was launched on 9 December 2021 and was installed at 540 Km above the Earth.
With IXPE's polarization measurements, NASA wanted to find out why black holes rotate, how pulsar X-rays are so bright, and where the jets of energetic particles coming from the region around supermassive black holes in the centers of galaxies come from. Get power.
