About 23,300,000 results
Open links in new tab
  1. Mars: Facts - NASA Science

    Nov 24, 2025 · With a radius of 2,106 miles (3,390 kilometers), Mars is about half the size of Earth. If Earth were the size of a nickel, Mars would be about as big as a raspberry.

  2. How Big is Mars? | Size, Compared to Earth, Mass, Gravity, & Facts ...

    6 days ago · Mars is a small planet, larger than only Mercury and slightly more than half the size of Earth. Its equatorial radius measures 3,396 kilometers (2,110 miles), with a mean polar …

  3. How Big is Mars? | Size of Planet Mars - Space.com

    Aug 2, 2012 · Mars is about half (53 percent) the size of Earth, but because Mars is a desert planet, it has the same amount of dry land as Earth.

  4. Mars - Wikipedia

    Its surface gravity is roughly a third of Earth's or double that of the Moon. Its diameter, 6,779 km (4,212 mi), is about half the Earth 's, or twice the Moon's, and its surface area is the size of all …

  5. ESA - Facts about Mars

    Diameter: 6794 km (about half the diameter of Earth) Surface area: 145 million sq km (about the same as Earth’s land area) Gravity: 3.711 m/s 2 (about one third of Earth’s gravity) Density: …

  6. Mars Facts | What Does Mars Look Like | All About Mars - Star Walk

    Oct 27, 2025 · The diameter of Mars is only about half of the Earth’s diameter, which is 12,742 km (7,917 miles). Also, Mars is only about two times bigger than our Moon, which is 3,474 km …

  7. Mars Statistics By Size, Missions and Facts (2025) - Sci-Tech Today

    Dec 1, 2025 · Mars has a diameter (distance from the center) of almost 6.791 kilometers, and it is roughly 50% of the Earth’s size. Mars is more likely to be struck by asteroid belt debris and …

  8. what is the size of mars - astronive.com

    Aug 23, 2025 · Mars, the fourth planet from the Sun, is a fascinating celestial body with a diameter of 6,779 kilometers. This terrestrial planet measures approximately half the size of …

  9. Mars: Size, distance from the Sun, orbit - Astronomy.com

    Oct 20, 2023 · Size: Mars is about 4,212 miles (6,779 kilometers) in diameter. Distance from the Sun: Mars is the fourth planet from the Sun and orbits roughly 142 million miles (229 million …

  10. Mars: Definition, Atmosphere, Size, Discovery, Surface

    Mar 27, 2025 · Mars has a diameter of 6,779 kilometers (4,212 miles), making it the second-smallest planet in the solar system after Mercury. The planet’s composition includes a dense …