UPSC 2002 › Science & Technology › Space Technology & Astronomy

In the year 2001, NASA launched a spacecraft to Mars named

The world's highest ground-based telescopic observatory is located in

Assume that the moon takes exactly 30 days to complete the cycle and also assume that it rises in the East exactly at 6.48 p.m. on the first day. On the fourth day, at what time will it rise?

With reference to Indian satellites and their launchers, consider the following statements:

1. All the INSAT-series of satellites were launched abroad
2. PSLVs were used to launch IRS-series of satellites
3. India used the indigenously built cryogenic engines for the first time for powering the third stage of GSLV
4. GSAT, launched in the year 2001, has payloads to demonstrate digital broadcasts and internet services

Which of these statements are correct?

Assertion (A): Artificial satellites are always launched from the earth in the eastward direction.

Reason (R): The earth rotates from west to east and so the satellite attains the escape velocity.