India, Feb. 27 -- Prime Minister Narendra Modi on Tuesday announced the names of the four astronauts who are undergoing training for Gaganyaan - India's maiden human space flight mission - at the Vikram Sarabhai Space Centre (VSSC) at Thumba near Thiruvananthapuram.

The prime minister bestowed "astronaut wings" to the four. Modi was at the VSSC to inaugurate three major technical facilities of the Indian Space Research Organisation (ISRO).

Modi inaugurated three major space infrastructure projects of ISRO during his visit to the Vikram VSSC. He also reviewed ISRO's Gaganyaan human spaceflight programme during his visit.

Modi, accompanied by Kerala Governor Arif Mohammed Khan, chief minister Pinarayi Vijayan and minister of state for ex...