Zwicky discovered dark matter when he realized that the stars in the Coma cluster provided only 1 percent of the mass required to keep galaxies from escaping
Edwin Hubble's observations revealed the universe is expanding, challenging our understanding of the cosmos
LIGO (Laser Interferometer Gravitational-Wave Observatory) confirmed Einstein's theory by detecting gravitational waves
The Boundary of Our Solar System, NASA's Voyager 1 reached the heliopause, the edge of our solar system
The discovery of black holes has revealed the universe's most extreme objects, warping space-time
Arno Penzias and Robert Wilson detected the Cosmic Microwave Background (CMB), the residual heat from the Big Bang
Dark energy, a force driving the expansion of the universe, has been discovered by scientists
In 1992 discovery of exoplanets revealed thousands of worlds beyond our own, potentially hosting life
NASA's Mars Reconnaissance Orbiter detected evidence of liquid water on Mars, a crucial ingredient for human survive