Humanity’s need to track the Moon's changing phases and motions is ancient. Mammoth hunters used the Moon as a timekeeper, carving crescent-shaped notches into bone and tusk. Sumerian astronomers ...

Four centuries ago, Johannes Kepler established three laws of planetary motion that accurately describe how planets in the solar system orbit the Sun. That might be enough for most; however ...

German astronomer Johannes Kepler, who also derived some of the first laws of planetary motion, observed the star for a year to track its… ...

Kepler and his laws of planetary motion What is now seen as “Kepler’s third law” was first conceived by Johannes Kepler on March 8, 1618. A.S.Ganesh takes a look at the man and the laws that ...

C, the cosmic speed limit, is the fastest anything in the universe can go. But how fast is that? And how do we know?

Scientists decode Johannes Kepler’s 417-year-old sunspot drawings, solving a long-standing mystery about solar cycles and the grand solar minimum.

So without further ado, presented in chronological order because I couldn’t make myself rank them by order of importance, I present to you the greatest astronomical discoveries of all time.

This was denoted by Johannes Kepler, a 17th-century German scientist who constructed mathematical models to figure out how to explain the movements of planets. Before Kepler, scientists thought ...

“Johannes Kepler,” McDowell replied, a reference to the 17th-century astronomer that set out three laws of planetary motion.