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  2. How Far is Mars From Earth? | Space Questions - The Nine Planets

    nineplanets.org/questions/how-far-is-mars-from-earth

    In theory the closest Earth and Mars can get is 33.9 million miles. This however has never been witnessed in recorded history. The closest ever recorded was 34.8 million miles in August of 2003. According to NASA the two planets will not be as close again until 2237.

  3. For this reason, to calculate the distance, we use the average to measure how far planets are from one another. The Astronomical units (AU) column is the average distance between Earth and the Sun and is the most common way for scientists to measure distance in our Solar System.

  4. How Long Did It Take Other Spacecraft To Reach Mars? - The Nine...

    nineplanets.org/questions/how-long-does-it-take-to-get-to-mars

    The best time to do it is when Earth and Mars are correctly lined up, and this happens once every 26 months. This is the open window astronomers target regularly. Traveling At the Speed of Light Towards Mars. In 2003, Mars reached its closest point to Earth, being located at only 54.6 million km / 33.9 million miles away.

  5. How Far is the Sun From Earth? | Distance, KM, Time Takes & Facts

    nineplanets.org/questions/how-far-is-the-sun-from-earth

    For comparison, Mars is 1.5 AU away from the Sun, which would translate to 227.94 million km / 141.70 million mi. Since the Earth moves around the Sun, the distance differs, with Earth’s closest point from the Sun – perihelion – reaching 147.5 million km / 91.3 million mi.

  6. How Far is Jupiter From Earth? | Distance, KM, How Long & Facts

    nineplanets.org/questions/how-far-is-jupiter-from-earth

    Since all the planets move around, the distane is always changing. On average, Jupiter is 715 million km / 444 million mi away from the Earth. At their closest points, Jupiter and Earth are 588 million km / 365 million mi away from each other. At their farthest points, Jupiter and Earth are 968 million km / 601 million mi.

  7. How Long Does it Take to Get to Ceres? | Space Questions - The...

    nineplanets.org/questions/how-long-does-it-take-to-get-to...

    It is situated between Mars and Jupiter and its distance from the Earth varies based on the positions in our respective orbits. Sometimes Earth and Ceres are closer to each other than to others. When at their closest Earth is roughly 146,309,842 miles away from Ceres. The two have not been that close since February 11th 1636.

  8. Space Travel Calculator | Uses Relativistic Rocket Formula

    nineplanets.org/tools/space-travel-calculator

    The Nine Planets has been online since 1994 and was one of the first multimedia websites that appeared on the World Wide Web. Take an interactive tour of the solar system, or browse the site to find fascinating information, facts, and data about our planets, the solar system, and beyond. Explore the Planets. Mercury. Venus. Earth. Mars. Jupiter.

  9. How many miles around the Earth? - The Nine Planets

    nineplanets.org/questions/how-many-miles-around-the-earth

    The short answer is around 24.901 miles. The mean radius of Earth is at around 3.958 mi / 6.371 km, slightly larger than Venus, almost twice the radius of Mars and about three times that of Mercury. If you started walking from one end to the other, you would have to cover more than 24.901 mi / 40.075 km. However, things are more complicated ...

  10. How Long Does Mars Take to Go Around the Sun?

    nineplanets.org/questions/how-long-does-mars-take-to-go...

    According to NASA the two planets will not be as close again until 2237. The furthest apart the two planets will be is 250 million miles which means on average Earth and Mars are 140 million miles apart. This distance varies based on the respective planets positions in their orbits of the Sun.

  11. How Big is the Earth? | Size Comparison, Actual Size & Facts

    nineplanets.org/questions/how-big-is-the-earth

    But just how big is the Earth? The Earth has a radius of 2.439 kilometers / 1.516 miles and a diameter of only 12.742 km / 7.917 mi. When it comes to weight, the mass of Earth is equivalent to 5.9 quadrillion kg. In the Solar System, our Earth is the fifth largest planet and the largest of the terrestrial planets.