Mercury - Science@NASA
May 7, 2025 · NASA's MESSENGER spacecraft is shown near Mercury in this illustration. Explore a curated collection of resources about Mercury. These resources include activities that can be …
Mercury (planet) - Wikipedia
Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars. The surface of …
Mercury Facts - Science@NASA
Apr 25, 2025 · Mercury formed about 4.5 billion years ago when gravity pulled swirling gas and dust together to form this small planet nearest the Sun. Like its fellow terrestrial planets, …
Mercury Missions, Astronauts, Technology - Britannica
Nov 13, 2025 · The initial U.S. effort to launch a human into space was known as Project Mercury. It was carried out by NASA, which had been given that responsibility over air force objections. …
Exploration of Mercury - Wikipedia
Mercury-P (Меркурий-П/Mercury-Landing) is a proposed lander mission to Mercury by the Russian Space Agency. The probe would utilize solar-electric propulsion to reach Mercury …
Mercury is hard to spot, but you can catch it in the morning sky …
Dec 4, 2025 · Mercury is called an "inferior planet" because its orbit is nearer to the sun than the Earth's. Therefore, it always appears from our vantage point to be in the same general …
Mercury's comet-like sodium tail visible 24 million km from sun ...
5 days ago · Mercury, long recognised as the innermost planet, exhibits a remarkable comet-like tail stretching millions of kilometers.
All About Mercury | NASA Space Place – NASA Science for Kids
Sep 25, 2025 · The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments, like the MASCS instrument used to create this …
Mercury: Exploration - Science@NASA
Apr 25, 2025 · Because Mercury is so close to the Sun, it is hard to directly observe from Earth except during dawn or twilight when the Sun's brightness doesn't outshine little Mercury.
Mercury Gallery - NASA Science
Sep 30, 2025 · The large, 400-kilometer-diameter (250-mile-diameter), impact basin Shakespeare occupies the bottom left quarter of this image from NASA's MESSENGER spacecraft.