Pictures of Mars
Facts about Mars and images of the Red Planet.
![Frosty white water ice clouds and swirling orange dust storms above a vivid rusty landscape reveal Mars as a dynamic planet in this sharpest view ever obtained by an Earth-based telescope. The Earth-orbiting Hubble telescope snapped this picture on June 26, when Mars was approximately 43 million miles (68 million km) from Earth - its closest approach to our planet since 1988. Hubble can see details as small as 10 miles (16 km) across. Especially striking is the large amount of seasonal dust storm activity seen in this image. One large storm system is churning high above the northern polar cap [top of image], and a smaller dust storm cloud can be seen nearby. Another large duststorm is spilling out of the giant Hellas impact basin in the Southern Hemisphere [lower right]. Acknowledgements: J. Bell (Cornell U.), P. James (U. Toledo), M. Wolff (Space Science Institute), A. Lubenow (STScI), J. Neubert (MIT/Cornell)](https://images.immediate.co.uk/production/volatile/sites/25/2021/05/Mars-d1e4afb.jpg?quality=90&webp=true&resize=1200,800 "Frosty white water ice clouds and swirling orange dust storms above a vivid rusty landscape reveal Mars as a dynamic planet in this sharpest view ever obtained by an Earth-based telescope. The Earth-orbiting Hubble telescope snapped this picture on June 26, when Mars was approximately 43 million miles (68 million km) from Earth - its closest approach to our planet since 1988. Hubble can see details as small as 10 miles (16 km) across. Especially striking is the large amount of seasonal dust storm activity seen in this image. One large storm system is churning high above the northern polar cap [top of image], and a smaller dust storm cloud can be seen nearby. Another large duststorm is spilling out of the giant Hellas impact basin in the Southern Hemisphere [lower right]. Acknowledgements: J. Bell (Cornell U.), P. James (U. Toledo), M. Wolff (Space Science Institute), A. Lubenow (STScI), J. Neubert (MIT/Cornell)")
Mars is a cold and dead world, but it wasn’t always this way. We know water once flowed on Mars. Orbital images reveal its valleys were formed by rivers, while surface experiments have found minerals that require liquid water to form.
Today, however, Mars's rivers are no more.
It’s thought that the Red Planet's thin atmosphere is to blame as the low pressure caused most of the oceans to boil away, while temperatures mean any remaining water is frozen.
What isn’t known is how long there was water on the surface.
It could be that ancient Mars was warm enough to hold permanent oceans, but it could also be the case that the water spent most of its time frozen, and only thawed when a volcano eruption or meteor impact heated the planet enough to create a flash flood.
Such eruptions were common in Mars’s early history.
With low gravity and air pressure, the volcanoes on Mars could grow to enormous size and the planet is home to the Solar System’s largest known volcano: Olympus Mons, a huge shield volcano 624km wide and 22km high.
However, the planet’s interior solidified around a billion years after its formation, freezing the planet in this early stage of formation. Could Mars volcanoes still be active?
Facts about Mars
- Diameter: 6792km (0.53 times Earth)
- Mass: 642 billion trillion kg (0.11 times Earth)
- Distance from the Sun: 228 million km (2.45 AU)
- Length of day: 24 hours, 37 minutes
- Length of year: 687 days (1.9 years)
- Number of moons: 2
- Temperature: -143ºC to 35ºC
- No of spacecraft visitors: 25+
- Number of moons: 2
- Type of planet: Rocky
How to observe Mars
Gábor Szendrői, Hungary, 30 March 2019. Equipment: Canon EOS 700D DSLR camera, Leica APO-Telyt-R 3.4 / 180mm lens.
Mars is best viewed around the time of its closest approach to Earth and opposition, when it appears largest on the sky.
To the naked eye, Mars is bright and has a slightly reddish hue, while through a telescope you should be able to make out the features on the lunar surface.
It is possible to see the planet the rest of the year provided it is visible in the night sky, but it will be much smaller and dimmer.
Why is it called Mars?
Mars is named after the god of war, whose Greek name is Ares, as the planet’s red colour is reminiscent of blood.
Mars’s two diminutive moons are called Phobos and Deimos (meaning fear and dread) after the god’s twin sons that are sometimes depicted as the horses pulling Mars’s chariot.
What missions have explored Mars?
Mars is probably the most thoroughly explored planet after our own, though it has a reputation for being cursed. Around half of all missions that attempt to travel to the planet have failed.
Despite this, the planet has seen several orbiter missions and a great many landing missions.
These have looked at all aspects of Mars’s geology, particularly focusing in on the history of water on the planet in an effort to predict whether life has ever existed on the planet.
To date, NASA has sent 5 rovers to the planet: Sojourner, Spirit, Opportunity, Curiosity and Perseverance.
The three most recent arrivals at Mars are NASA's Perseverance rover, the Emirates Mars mission and China's Zhurong rover.
For more on the new Mars missions, watch our interview with planetary scientist Emily Lakdawalla.
Mars missions
- Mariner programme (1965–71, NASA)
- Viking (1976, NASA)
- Mars Global Surveyor (1997, NASA)
- Pathfinder and Sojourner (1997, NASA)
- Mars Odyssey (2001)
- Mars Exploration Rovers, Spirit and Opportunity (2004, NASA)
- Phoenix (2008); Curiosity (2012, NASA)
- ExoMars Trace Gas Orbiter (2016)
- InSight (2018)
- Perseverance (2021)
Pictures of Mars
Below is a selection of images of Mars captured by astrophotographers and BBC Sky at Night Magazine readers.
For astro imaging advice, read our guide on how to photograph Mars, how to photograph planets or our beginner's guide to astrophotography.
And if you do manage to capture an image of Mars, we'd love to see it! Don't forget to send us your images or share them with us via Facebook, Twitter and Instagram.
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