The Synthesis of "redshift"

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

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

Discover blueshift, the phenomenon where light waves shorten as an object moves toward an observer. Learn its role in astronomy and the Doppler effect.

Discover the Doppler effect, the change in wave frequency from a moving source, explaining everything from ambulance sirens to the expanding universe.

Discover the red giant, a dying star in a late stage of stellar evolution. Learn what happens when a star like our Sun runs out of hydrogen fuel.

Discover giant stars, massive celestial bodies in a late stage of stellar evolution. Learn about their types, formation, and their cosmic significance.

Discover red dwarfs, the most common stars in the universe. Learn why these long-lived, dim stars are top targets in the search for habitable exoplanets.

Discover the radial velocity method, a key technique using the Doppler effect to find distant exoplanets by observing tiny stellar 'wobbles'.