Mars questions This is a list of recently added questions about Mars. How long is the solar day on Mars?24 hours, 39 minutes, and 35.244 seconds. The solar day on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds.Created by: Ninjaivery hard 39% 24 hours, 39 minutes, and 35.244 seconds24 hours, 39 minutes, and 35.244 seconds135644 hours, 12 minutes, and 35.244 seconds44 hours, 12 minutes, and 35.244 seconds127862 hours, 18 minutes, and 35.244 seconds62 hours, 18 minutes, and 35.244 seconds50086 hours, 54 minutes, and 35.244 seconds86 hours, 54 minutes, and 35.244 seconds267planets riddles » How many moons does Mars have? 2. Mars is the fourth planet from the sun. Mars has two Moons, Phobos and Deimos. They were both discovered in 1877, by Asaph Hall at the Naval Observatory in Washington DC. Created by: Tschukahard 52% 1132422226133504Mars has no moonsMars has no moons1221Solar System riddles » What was the first probe that successfully landed on Mars?Viking 1 was the first of two spacecraft (along with Viking 2) sent to Mars as part of NASA's Viking program. On July 20, 1976, it became the first spacecraft to land successfully on Mars and perform its mission. Viking 1 held the record for the longest Mars surface mission of 2307 days until that record was broken by Opportunity on May 19, 2010.Created by: Tschukavery hard 37% CuriosityCuriosity1337Viking 1Viking 12155Pionner 10Pionner 101344Luna 1Luna 1852astronautics riddles » How long is stellar year on Mars?687 Earth days. The Martian year is almost twice longer than Earth's year.Created by: Tschukavery hard 29% 687 Earth days687 Earth days609423 Earth days423 Earth days343183 Earth days183 Earth days366121 Earth days121 Earth days738astronomy riddles » Mars colonisation is a hype topic. What is the biggest threat for those wishing to take a part in a journey to Mars?Cosmic rays. The only efficient protection against high energetic cosmic radiation, one we are granted with, is Earth magnetic field. Both during a long flight to Mars and through the stay on the planet, that did not form electromagnetic field, astronauts would be exposed to ionization. Created by: smyruhard 53% low temperatureslow temperatures1864lack of oxygenlack of oxygen5423poor gravitypoor gravity1479cosmic rayscosmic rays10229physics riddles » Which rover was the first to explore Mars?Sojourner was the first Mars rover. It was much smaller then Curiosity, whose wheel is about the size of the whole Sojourner. It landed on July 4, 1997 as part of Mars Pathfinder mission on Mars's Ares Vallis and remainded in contact with Earth till September 27, 1997.Created by: smyruvery hard 31% CuriosityCuriosity1476OpportunityOpportunity911SojournerSojourner1492SpiritSpirit835space riddles » Olympus Mons is the largest known volcano. Where is it?On Mars. Olympus Mons (Latin for Mount Olympus) is a large shield volcano on the planet Mars, having a height of nearly 22 km (14 mi). Being a shield volcano, it has a very low profile. The average slope on the volcano's flanks is only 5°. Because of that, an observer standing on the Martian surface would be unable to view the entire profile of the volcano, even from a great distance.Created by: Trương Ngọc Hùngaverage 62% in Australiain Australia1251in Indonesiain Indonesia2823in Antarcticain Antarctica4273on Marson Mars14130volcanoes riddles » Play astronomy quiz and see all the questions.