The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.
Length of Year:687 Earth days365.24 days Temperature:-87 to -5 °C-88 to 58°C Mars Features Moons Mars has two small moons,PhobosandDeimos. They were discovered in 1877 by astronomer Asaph Hall, who named them for the Latin terms “fear” and “panic”. These moons are thought to be...
Leap Day, on February 29, is how we alignour calendarwith theseasons. Ayear on Earthdoesn’t last a round number of Earth days. It takes our planet 365.24219 days to complete a full lap around the Sun (from one March equinox to the next). That means our calendar isoff by about a ...
During the Martian wintertime, night temperatures on Mars may drop below minus 100 degrees Celsius with high probability of sandstorms, and the winter season lasts an equivalent of six Earth months. The unique environment on Mars poses tremendous challenges for the rover. To tack...
In this illustration made available by NASA, the Mars 2020 Perseverance rover studies a Mars rock outrcrop. NASA on Thursday hopes to see the completion of a 300-million-mile voyage from Earth to Mars with the landing of a rover that will search for signs of an...
Mars (火星) is the fourth planet from the sun.It is 141million miles away from the sun.It has two moons.A year on Mars is 687earth-days long.Mars is about half the size of Earth.Because Mars is smaller than Earth,its gravity (重
Mars is the fourth planet from the sun. It is 141 million miles away from the sun. A year on Mars is 687 Earth-days long. One day is about the same as on Earth: 24. 25 hours long. Mars is about half the size of Earth. Because Mars is sm
Because Mars has no magnetic field, humans would receive whopping doses of cosmic radiation — not a problem on Earth, where the planet's magnetic field works to block it out. A 1,000-day trip to Mars has the potential to result in a 40 percent chance of the astronaut developing cancer...
In short, Mars’ current state is the opposite of Earth today. While we have too much carbon dioxide due to our activities, the Red Planet doesn’t have nearly enough to create beneficial global warming. It’s too bad we can’t export our excess CO2 to Mars, though it still wouldn’t...
Length of Day:24 hours 24h 40m Length of Year:365.25 days686.971 days Water:Plentiful Intermittent (mostly frozen) Polar Ice Caps:Yep Yep In short, compared to Earth, Mars is a pretty small, dry, cold, and dusty planet. It has comparatively low gravity, very little atmosphere and no brea...