The Synthesis of "Hubble's law"

Discover cosmological redshift, the key evidence for the expanding universe. Learn how light from distant galaxies stretches as space itself expands.

Discover redshift, where light from distant galaxies stretches to redder wavelengths, providing key evidence for the universe's expansion.

Discover Cepheid variables, the pulsating stars that act as cosmic yardsticks, allowing astronomers to measure vast distances across the universe.

Discover the Hubble Space Telescope, a revolutionary observatory that has transformed our understanding of the cosmos for over three decades of service.

Discover cosmic calibration, the method of measuring vast distances in space to understand the universe's expansion and solve cosmic mysteries.

Explore astrophysics, the science applying physics to understand the universe, stars, and galaxies. Discover why this cosmic field is captivating us now.

Discover Kepler's three laws of planetary motion, which describe how planets orbit the Sun. Learn why these fundamental principles of astronomy matter.

Discover the cosmological constant, Einstein's concept for the energy of empty space, and its role in the universe's accelerating expansion.

Discover elliptical galaxies, the smooth, oval-shaped star cities that hold clues to the universe's history and evolution. Learn why they matter.

A simple guide to Boyle's Law, the fundamental scientific principle that explains the inverse relationship between the pressure and volume of a gas.