India's first manned space flight — Gaganyaan — is expected to send three persons into space for 7 days. The spacecraft, carrying a three-person crew, will take just 16 minutes to reach space after its launch, and will spend 5-7 days in a low earth orbit of 300 to 400 km, before returning to Earth.GSLV Mk III, the three-stage heavy lift launch vehicle, will be used to launch Gaganyaan as it has the necessary payload capability. The mission was announced by Prime Minister Narendra Modi on this Independence Day.