Is it colder than Mars?

By Mario Carr

Over the last few weeks, it’s been reported that it’s colder than the surface of Mars.

Maybe, it’s temporarily warmer at high noon on the Martian equator but it’s common for temperatures to dip more than 100 degrees at night, since the atmosphere is too thin to Mars%20V1hold heat. The Martian rover Opportunity has recorded summer daytime temperatures fluctuating from 30 degrees Celsius down to -80 degrees C at night.

Opportunity has spent a decade on the planet after landing on the surface Jan. 24, 2004. Its longevity may be due to Martian winds blowing dust off its solar panels.

Even though Mars is colder than Earth, it’s still warm enough to melt water. However, past the orbit of Jupiter there’s only ice because the Sun’s heat is too weak to melt water. Even though it may seem cold here, it’s still considered a tropical paradise compared to Mars and the outer planets.

Planet watching

Mercury can be seen in the first week of Feb. in the southwest evening twilight sky. It reappears on Feb. 15 in the dawn southeast dawn twilight sky and becoming brighter.

Venus appears in the southeast dawn sky and becomes brightest on Feb. 15. Mars rises during late evening. The summer solstice for the northern hemisphere of the planet also occurs. Jupiter can be seen in the evening sky. Saturn rises after midnight.

Feb. 6 – If you have a telescope, the shadows of moons Europa and Callisto can be seen crossing the face of Jupiter.

Feb. 10 – The moon is below Jupiter in the evening sky.

Feb. 14 – Hamilton Amateur Astronomers meeting 7:30-9:30 p.m., Spectator building, 44 Frid St., Hamilton. McMaster Astronomer Robert Cockcroft will discuss Ancient Egyptian Astronomy. Free admission with door prizes and everyone is welcome. An optional food bank donation of non-perishable goods will be collected. There is also a full moon.

Feb. 18 – During the evening from a dark location you could see sunlight reflecting off dust particles in the solar system. This light is called the Zodiacal light and can be seen for the next two weeks. From midnight to dawn the Moon, Spica and Mars form a triangle.

Feb. 21 – The moon is close to Saturn in the early morning sky.

Feb. 26 – The crescent Moon is close to Venus in the dawn sky.

Feb. 27 – The crescent moon is close to Mercury in the dawn sky.

For more information, please see the Hamilton Amateur Astronomers web site at or call (905) 627-4323. If you would like to learn more about the night sky, the club offers a basic astronomy course for new members

Mario Carr is the club’s director of public education and can be reached at

About Mario Carr

Mario Carr has a Physics degree from McMaster University and hosts this blog. He is the director of publicity for the Hamilton Amateur Astronomers and has helped to raise the profile of the group. He writes an astronomy column and appeared on CHCH-TV to talk about the night sky. Mario is the founder of the Carr Marketing Group in Burlington, Ontario and can help with your marketing, communications, publicity and public relations needs. He can be reached at or
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