Planet Mars: Click (or touch) and drag to interact with this 3D model of Planet Mars. 2001 Mars Odyssey.
|Average Distance from Sun||93 million miles||142 million miles|
|Average Speed in Orbiting Sun||18.5 miles per second||14.5 miles per second|
|Diameter||7,926 miles||4,220 miles|
|Tilt of Axis||23.5 degrees||25 degrees|
The radius of Mars is 3,389.5 km, which is just over half that of the Earth’s: 6,371 km. If you assume they’re both perfect spheres, this means that you can actually fit about 7 Mars’s inside Earth!
According to multiple studies, around 1,000 Jupiters could fit into the Sun.
Overall, Mars is cold—its average global temperature is around -80 degrees Fahrenheit —and has a much thinner atmosphere than Earth. Because it has about a sixth of the pressure of Earth’s atmosphere, the planet doesn’t retain heat very long, causing temperatures to drop quickly.
On Mars, oxygen is only 0.13% of the atmosphere, compared to 21% of the Earth’s atmosphere. The MOXIE system essentially produces oxygen like a tree — pulling in the Martian air with a pump and using an electrochemical process to separate one oxygen atom from each molecule of carbon dioxide, or CO2.
The first successful flyby of Mars was on 14–15 July 1965, by NASA’s Mariner 4. On November 14, 1971, Mariner 9 became the first space probe to orbit another planet when it entered into orbit around Mars. The Soviet probes Phobos 1 and 2 were sent to Mars in 1988 to study Mars and its two moons, with a focus on Phobos.
Deep within Neptune and Uranus, it rains diamonds—or so astronomers and physicists have suspected for nearly 40 years. The outer planets of our Solar System are hard to study, however.
Mars (diameter 6790 kilometers) is only slightly more than half the size of Earth (diameter 12750 kilometers). Note the difference in color between the two planets. Almost 70% of Earth’s surface is covered by liquid water. In contrast, Mars now has no liquid water on its surface and is covered with bare rock and dust.
More than one million Earths could fit inside the Sun if it were hollow. The Sun has a radius of 696.340 km / 432.685 mi and a diameter of 1.39 million km / 864.000 mi. Earth, for comparison, has a radius of only 2.439 km / 1.516 mi, and a diameter of just 12.742 km / 7.917 mi.
” Jupiter is called a failed star because it is made of the same elements (hydrogen and helium) as is the Sun, but it is not massive enough to have the internal pressure and temperature necessary to cause hydrogen to fuse to helium, the energy source that powers the sun and most other stars.
A: The biggest star size-wise is VY Canis Majoris, which is about 2,000 times wider than our sun. You can fit 9.3 billion of our suns into VY Canis Majoris. This star is about 4,900 light years from Earth and is found in the constellation Canis Major.
About 7.5477×1010 earths can fit in VY Canis Majoris.
Mars does have an atmosphere, but it is about 100 times thinner than Earth’s atmosphere and it has very little oxygen. The atmosphere on Mars is made up of mainly carbon dioxide. An astronaut on Mars would not be able to breathe the Martian air and would need a spacesuit with oxygen to work outdoors.
The average temperature on Venus is 864 degrees Fahrenheit (462 degrees Celsius). Temperature changes slightly traveling through the atmosphere, growing cooler farther away from the surface. Lead would melt on the surface of the planet, where the temperature is around 872 F (467 C).
Ironically, soil is not needed to grow trees. However, even with hydroponics you could not grow a tree out in the open on Mars for many reasons, foremost amongst which is the requirement for oxygen. All Earth plants require oxygen, it is their way to survive through the night, by “breathing”.