Astrophysics began when observations of astronomy could be interpreted according to the physical laws governing the stars and other objects in the Universe.
Massive galaxies are one of the predominant populations in our universe today.
The stars seem immutable. From day to day we see no appreciable changes in the sky, and our star maps are the same as those drawn by our ancestors.
The speed of light was discovered at the Paris Observatory in 1676 from a study of the satellites of Jupiter, but
The European Space Agency's (ESA) Gaia satellite is revolutionizing the astronomy, providing unprecedented clues
