When Kepler studied his boss Tycho Brahe 's observations of Mars's position in the sky on many nights, Kepler realized that Mars's orbit could not be a circle. After years of analysis, Kepler …

Nov 24, 2025 · Earth-Mars Comparison: This composite image, from NASA Galileo and Mars Global Survey orbiters, of Earth and Mars was created to allow viewers to gain a better …

Dec 16, 2025 · After nearly 20 years on the Red Planet, NASA's Mars Reconnaissance Orbiter (MRO) has snapped its 100,000th image of the surface with its HiRISE camera. Short for High …

Dec 17, 2025 · The HiRISE camera on NASA's Mars Reconnaissance Orbiter just notched a big milestone, snapping its 100,000th photo of the Red Planet.

Dec 18, 2025 · Because of Mars’s relatively elongated orbit, the distance between Mars and the Sun varies from 206.6 million to 249.2 million km (128.4 million to 154.8 million miles). Mars …

This visualization shows the current location and communication activity of all operating landers, rovers and orbiters at Mars that transmit data to Earth via NASA’s Mars Relay Network.

Oct 20, 2023 · Mars is the fourth planet from the Sun and orbits roughly 142 million miles (229 million km) away from the Earth.

NASA is confronting a rare double setback at Mars, with one long-serving orbiter suddenly falling silent and another aging spacecraft expected to reach the end of its life soon. The twin …

In 1971 Mariner 9 entered orbit around Mars, being the first spacecraft to orbit any body other than the Moon, Sun or Earth; following in the same year were the first uncontrolled impact …

Mars Global Surveyor reached Mars orbit on September 11, 1997, beginning a highly successful mapping mission that lasted nearly a decade and revealed evidence of ancient water features …