After 3,80,000 years of Big Bang, recombination happened which made the universe turn transparent. There are no answers to what preceded the Big Bang.
Mars shares a lot of similarities with Earth along with sharing proximity.
The dead satellites and the residues left behind in various missions make up for a lot of space junk.
The recent collision of neutron stars showed light first and a few minutes after showed gravitational waves.
Zapping simulated space ice with imitation starlight makes the ice act more like a liquid than a solid, meaning similar ices in space might be good places for organic chemistry.
Vikram Sarabhai played an instrumental role in building up the astronomical department in India and establishing space research facilities in India.
China has been successful in launching its first X-ray space telescope for studying the black holes, gamma ray bursts, and pulsars.
The Final Frontier- ISRO Launches Spacecraft To Reach Neighbouring Star System, In a Stephen Hawking-backed Project
Interstellar space travel, that is travel to another star system or travel between galaxies.