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Learn about Mars, the fourth planet from the Sun, and its potential for life, seasons, moons, and more. Explore its structure, surface, atmosphere, and history with NASA's images and data.
- Mars is also referred to as the “Red Planet” because it has high content of iron oxide which makes it appear reddish. However, gold, brown, tan, and green can also be seen on the surface as other minerals are also present.
- Mars’ dense core is made of iron, nickel, and sulphur. Elements present in its rocky mantle include iron, magnesium, aluminium, calcium, and potassium.
- Due to its red colour, Mars was named after the Roman god of war Mars (known as Ares by the Greeks).
- Mars has a thin atmosphere.
1 day ago · Mars is the fourth planet in the solar system in order of distance from the Sun and the seventh in size and mass. It is a periodically conspicuous reddish object in the night sky. There are intriguing clues that billions of years ago Mars was even more Earth-like than today.
- How far is Mars from Earth?Mars is less than 56 million km (35 million miles) from Earth at its closest approach, but it recedes to almost 400 million km (250 million miles)...
- What is the size of Mars?Mars is the second smallest planet in the solar system, only larger than Mercury and slightly more than half the size of Earth. It has an equatoria...
- What do Mars and Earth have in common?Mars is similar to Earth in many ways. Like Earth, it has clouds, winds, a roughly 24-hour day, seasonal weather patterns, polar ice caps, volcanoe...
- What is the temperature on Mars?The characteristic temperature on Mars in the lower atmosphere is about 200 kelvins (K; −100 °F, −70 °C), which is generally colder than the averag...
- When did Viking 1 and Viking 2 land on Mars?The Viking landers are two robotic U.S. spacecraft launched by the National Aeronautics and Space Administration (NASA) for the study of the planet...
- Should humans colonize space on Mars?Space colonization, on Mars or elsewhere, is widely debated. Some argue humans have a moral duty to save our species from extinction, and space col...
- Named after the Roman God of war, Mars is the fourth planet from the sun in our solar system.
- Mars is also known as the ‘Red Planet’ because, well, it’s red! This signature colour comes from the large amount of a chemical called iron oxide (or ‘rust’ as you might know it) in its rocks and soil.
- Mars is the second smallest planet in the solar system after Mercury. With a diameter (distance through the middle) of 6,791 kilometres, it’s roughly half the size of Earth.
- It can get pretty cold on Mars –– much colder than our own planet, since it’s further away from the sun. At the equator, temperatures can reach 20°C, but at its poles they can plummet to as low as -140°C.
Learn about Mars, the fourth planet from the Sun, and its history, climate, and moons. Explore the robotic missions and human plans to study and visit the Red Planet.
