:: Mars ::

Mars is the 4th planet from the Sun. It is named after the Roman god of war, most likely because of its red appearance.

Although Mars is just one fifth of the size of the Earth, it has many things in common. Mars has seasons very similar to earth, it has a spring, summer, autumn and a winter. This is due to the rotational tilt of the planet being nearly the same as Earths. Because Mars is further from the Sun than the Earth it takes longer to orbit around it. In fact Mars takes nearly twice as long to orbit the Sun as the Earth does. Because of this, 1 year on Mars is the equivalent to nearly 2 years on Earth (687 Earth days).

Main features on Mars

Olympus Mons: Mars is home to the biggest known mountain in the solar system. Olympus Mons stands about 27km (16.77 miles) high! This is about 3 times as high as Mount Everest which stands at 8.8km (5.47 miles).

Olympus Mons. Viking Orbiter 1 color mosaic. Image: NASA and the Jet Propulsion Laboratory Olympus Mons from orbit Olympus Mons shown next to smaller mountains on the Martian surface

Valles Marineris: The Valles Marineris was named after the Mariner 9 Mars orbiter which discovered it in 1971 / 72. Valles Marineris is a canyon that is over 4000km (2480 miles) long and more than 200 km (124 miles) wide. That makes this canyon the biggest known canyon in the solar system.

Valles Marineris canyon system. Image Credit: NASA/MOLA Science Team/O. de Goursac-A. Lark Image showing all of the Valles Marineris from space Image showing all of the Valles Marineris at an angle from orbit


How to find Mars with your telescope.

Mars follows a very similar orbit around the Sun to the Earth but takes nearly twice as long to complete. This is because Earth orbits closer to the Sun than Mars so it has less distance to cover to complete a full orbit (Earth has the inside track).
Take a look at the illustrations below:


Figure 1: Earth vs Mars orbitting pattern
Dates of Mars Opposition
DateDist. From EarthMagnitude
August 28th 200334.6 Million Miles-2.88
November 7th 200543.1 Million Miles-2.33
December 24th 200754.7 Million Miles-1.64
January 29th 201061.7 Million Miles-1.28
March 3rd 201262.6 Million Miles-1.23
April 8th 201457.4 Million Miles-1.48
May 22nd 201646.7 Million Miles-2.06
July 27th 201835.7 Million Miles-2.78
October 13th 202038.5 Million Miles-2.62
Source:http://seds.org/~spider/spider/Mars/marsopps.html

Notice that the Earth has a much tighter orbit around the Sun than Mars does. The best time to view Mars is when it is at opposition. This occurs every two years when the Earth is positioned directly between the Sun and Mars.

A picture of Mars taken from the Hubble Space Telescope
A picture of Mars taken from the Hubble Space Telescope

:: Facts ::

Mars is the 4th planet from the Sun.

Mars was named after the Roman god of war. Probably because of its redish colour

Diameter: 6794.4 km (roughly half the size of Earth

Martian Day: 24 hours, 39 minutes and 35 seconds

Martian Year: 685 Earth days, 18 hours.

Orbits the Sun every 687 days (1 year)

Average Distance from Sun: 142 million miles

Temperatures vary from -200°F to up to 68°F in the summer.

Mars has two moons, Phobos and Deimos


:: Information on the Planets ::
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune