Solar System is the family of planets on which we exist. Our wonderful blue planet is the third in line from the Sun. We look on Sun every day.
Astrophysics is the branch of astronomy that employs the principles of physics and chemistry to ascertain the nature of astronomical objects.
Rockets were well in use before the 20th century. Rockets were all conventional solid-fuelled rockets. The multi-stage rockets made possible space travel.
The Cold War was a geopolitical confrontation between two opposing blocs which lasted from just after World War 2 ended to the fall of the Soviet Union in 1991.
SpaceX is so popular nowadays that almost everybody has known or heard its name. The company was founded in 2002 by Elon Musk.
The science goals of the James Webb Space Telescope are to look for stars and galaxies that formed just after the Big Bang took place.
On July 21, 1969, humanity witnessed one of its greatest ever achievements taking place, not on the Earth, but 3,00,000 km away, on the moon.
The Big Bang Theory is a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution.
The steady-state model was proposed by three physicists in 1948, Hermann Bondi, Thomas Gold, and Fred Hoyle to explain the structure and working of Universe.
Spectroscopic parallax is an astronomical method for measuring the distances to stars. It can be applied to any main sequence stars for which a spectrum can be recorded.