Mars questions This is a list of recently added questions about Mars. 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: Tschuka very hard 37% CuriosityCuriosity1219Viking 1Viking 11917Pionner 10Pionner 101252Luna 1Luna 1788astronautics riddles » How long is stellar year on Mars?687 Earth days. The Martian year is almost twice longer than Earth's year.Created by: Tschuka very hard 28% 687 Earth days687 Earth days515423 Earth days423 Earth days241183 Earth days183 Earth days324121 Earth days121 Earth days725planets 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 temperatures1799lack of oxygenlack of oxygen5205poor gravitypoor gravity1431cosmic rayscosmic rays9747Solar System 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% CuriosityCuriosity1377OpportunityOpportunity845SojournerSojourner1355SpiritSpirit791space 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 Australia1203in Indonesiain Indonesia2727in Antarcticain Antarctica4108on Marson Mars13381volcanoes riddles » Play astronomy quiz and see all the questions.