When is lunar day celebrated? July 21 Who was the first Italian scientist to observe craters on the moon? Galileo Galileo  The study of the moon? Selenology The first astronaut to land on the Moon ? Neil Armstrong Which is the world’s first artificial satellite? Sputnik (Russia) Which is the first space shuttle in the … Continue reading സാക് ഇന്ത്യ – SAK India Quiz Competition Model Questions and Answers