It's Red Planet Day, an event designed to honour the fourth planet in our solar system, Mars.
The day commemorates the launch of Spacecraft Mariner 4, which was brought within 6,118 miles of the red planet during its 228 day mission, on November 28 1964.
To celebrate the celestial body named after the Roman God of war, here are 10 tracks about the red planet.
Life on Mars?
David Bowie
Released as a single in 1973, this track was called "a cross between Broadway musical and Salvador Dali painting" by Radio 2. It features Rick Wakeman on piano and was inspired by Frank Sinatra's My Way.
Ballrooms of Mars
T.Rex
This track is taken from the band's seventh album, The Slider. The album, which also included Metal Guru, was produced by Tony Visconti and was the group's second glam rock record.
Red
Taylor Swift
Taken from her fourth album of the same name, this track debuted at six in the US Billboard 100 in October 2012. Swift uses colours in the song to describe her emotions about a relationship.
Another Girl, Another Planet
The Only Ones
This 1978 track was the second song released from the English punk/new wave group's first album, The Only Ones. It's been covered by artists including Blink 182 and Belle & Sebastian.
Girl from Mars
Ash
This track was the group's first top 40 single, reaching 11 in the UK. It was written by Tim Wheeler when he was 16 and performed by the band on Top of the Pops two weeks after their A-level exams.
Million Miles Away
The Offspring
The third single from the band's sixth studio album Conspiracy of One, this track was featured in the trailer for Jack Black film Orange County. It reached number 21 in the UK charts in June 2000.
The Lady in Red
Chris De Burgh
Released in 1986, this track reached number one in Canada, the UK, Ireland, Belgium and Norway. It was inspired by De Burgh's memories of the first time he met his wife Diane.
Venus and Mars
Wings
Written by Paul and Linda McCartney, this acoustic track is about a concertgoer who is waiting for a show to start. Paul McCartney has denied suggestions that the title is a reference to him and Linda.
Intergalactic
Beastie Boys
The first single taken from the band's fifth album Hello Nasty, this track includes samples from 1986 film From Beyond, the Jazz Crusaders' album Powerhouse and 1985 film The Toxic Avenger.
Mars, the Bringer of War
Gustav Holst
This track is the first movement in Holst's Planets suite. The suite's concept is astrological, with the movements conveying ideas and emotions associated with each planet's influence on the psyche.
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