1. Fourth planet from the Sun. Diameter 4,220 miles. Called the Red Planet from its colour as seen through a telescope; colour varies from butterscotch to dark brown. Much of this is from iron oxide (rust) in surface rocks. Surface gravity 38 percent that on Earth, about the same as Mercury, an effect jointly of Mars' larger size and lower density. The least dense of the rocky terrestrial planets in the system. One tenth of Earth's mass. Atmosphere mostly carbon dioxide, surface pressure varies by location and season between about 5 and 7 millibars. Surface features include Mariner Valley, a canyon system that would stretch across the United States on Earth, and four large shield volcanoes on the highland area known as the Tharsis Bulge, the largest of which is Olympus Mons, the largest mountain on any major planet in the system, three times the height of Everest and covering an area about the size of Romania. Has been visited by numerous space probes, including the Viking landers, the Sojourner rover and the Spirit and Opportunity Rovers. Currently being orbited by the Odyssey, Express and Reconnaissance Orbiters, making it the planet with the most artificial satellites beyond Earth. Although the surface is almost certainly sterile, Mars has often been imagined as an abode of life, appearing as such in works by, among others, C.S. Lewis, H.G. Wells and Edgar Rice Burroughs. There is some evidence of liquid surface water in its early history, although the atmosphere has grown too thin to allow this any more. Appears in some ways earthlike, with dust storms (especially at perihelion passage, the closest passage to the sun), growing and shrinking (largely carbon dioxide) ice caps and even, at 24 hours and 40 minutes, the most earthlike length of day of any other planet in this system. Two moons, Phobos and Deimos, both asteroids, circle the planet, the former the lowest-orbiting moon of any major planet in the system and set to run smack into Mars in about another 40 million Earth years.

2. The fourth planet's namesake, the ancient Roman god of war. Bit of a meathead, but then it was his job. Had an affair with Venus ... well, who wouldn't? Greek equivalent was Ares.

3. Chunky nougat-caramel-chocolate bar, or the company that makes them.
In the previous few months, Mars had been getting brighter in the night sky.

Oh Mars, let my armies surround those of my enemy Calipurnius and righteously whup his ass.

Got a Mars Bar?
by Fearman May 10, 2008
Get the Mars mug.
The First and best movement of Gustav Holst's Planet Suite. You kind of get a feeling when you listen to it to pick up a weapon and go to war.
Mars is the most amazing planet because of the two euphonium solos.
by MCREE August 3, 2007
Get the Mars mug.
"Les rues sales du centre ville de Mars est mon turf" -IAM
by lenev August 17, 2006
Get the mars mug.
MAR IS THE PRETTIEST GIRL ALIVE,I LOVE HER SO MUCH
have you ever met mar??NO???bad for you,that's not my problem,i alredy have my mar,fuck you
just to inform you,mar is a literal bless,an amazing girlfriend AND wife
nobody is ever gonna be like mar,and that sucks.....for you,not for me LMAO
mar is nathan's gf<333
by ewwnathan November 20, 2021
Get the mar mug.
the surface is not hospitable to humans or most known life forms due to the radiation, greatly reduced air pressure, and an atmosphere with only 0.16% oxygen. ... Human survival on Mars would require living in artificial Mars habitats with complex life-support systems.So how did Mars die? After repeatedly skimming the upper reaches of the Martian atmosphere with an orbiting probe, researchers have another piece of the puzzle—they discovered that H2O molecdon't

Diet planet: Mars's gravity.
Climate change: At the equator, Mars is a comfortable 80 degrees Fahrenheit, but the temperature at its poles can get down to 199 degrees below zero.Can we plant trees on Mars?
You can; you just have to compress the atmosphere into a greenhouse and plant them in soil that has been filtered of Mars' perchlorate salt that's toxic to higher life. a) The ground isn't suitable for plants. There aren't enough minerals and there is no water. And if there is liquid water, it's extremely salty.Our results indicate that (meta)stable brines on the Martian surface and its shallow subsurface (a few centimeters deep) are not habitable because their water activities and temperatures fall outside the known tolerances for terrestrial life," they wrote in the new study, which was published online Monday (May 11)Mars is sometimes called the Red Planet. ... Like Earth, Mars has seasons, polar ice caps, volcanoes, canyons, and weather. It has a very thin atmosphere made of carbon dioxide, nitrogen, and argon.
Mars is Very Cold!!!
by Deez Gutz April 27, 2021
Get the Mars mug.
Such a delicate and beautiful girl,once you get to know her you’ll fall in love with her,she’s kind of mean and too sarcastic but all she needs is love and affection then she’ll be all yours
Person 1: Dang that girl just roasted him

Person 2: She must be a Mars
by Just.an.ordinary.gyal January 13, 2018
Get the Mars mug.
The prettiest girl you will ever meet. She is someone hard too not like. She is liked by many. As she seems very happy she holds a life-long secret. Mostly the popular girl at your school. She will do anything for the one she loves. Hard too let go of ex’s or the ones she loves. Hurting her/ Or her feelings will not end in a happy result. Most likely she will beat your ass.
Person 1; Who is that?
Person 2; The popular girl.
Person 1; Whats her name? Shes really hot.
Person 2; Its Mars.
by Urban District April 17, 2021
Get the Mars mug.