# Mars Nights (DD-603) > NASA describes Mars's atmosphere as thin and made up mostly of carbon dioxide, with nitrogen and argon. Astronomy magazine puts it at about 1% of Earth's and notes that with so little air, the stars barely twinkle, and with no light pollution the nights are very dark. Dust is the catch. Rover observations show that even straight overhead, suspended dust dims stars by about one magnitude, and by up to four magnitudes near the horizon. When the sky is clear, NASA's Opportunity rover could just pick out magnitude 6 stars, about the limit of the human eye. Dust also makes Martian twilight last much longer. The constellations look the same as from Earth. BBC Sky at Night Magazine explains that Mars is so close to Earth, compared with the distance to the stars, that there's no visible parallax shift: Orion and Cassiopeia keep their shapes. What does change is the sky's pivot. Mars's axis points between Deneb in Cygnus and Alderamin in Cepheus, near only a faint star, so Mars has no bright North Star like Polaris. Earth appears as a bright morning or evening 'star', with the Moon beside it. On January 31, 2014, NASA's Curiosity rover photographed exactly that, about 80 minutes after sunset. Mars's two moons are visible too: Phobos rises in the west, crosses the sky in about four hours and visibly changes phase along the way, while Deimos looks like a very bright star. The footage shows a dense Milky Way-style star field above dark red ground, an artistic composite rather than a rover photograph. - Department: Space (also Science) - First published: 2025-06-25 - Last updated: 2025-06-25 - Permalink: https://detailenjoyer.com/case/mars-nights/ - Author: Marcus Easterling (DetailEnjoyer), The Detail Department ## On the timeline - **Jan. 31, 2014**: NASA's Curiosity rover photographs Earth and the Moon in the Martian evening sky Full timeline: https://detailenjoyer.com/timeline/?case=mars-nights ## Quick facts - **DD-603-F01**: Constellations look the same from Mars as from Earth. _(Write-up · Exhibit C (Same constellations))_ - **DD-603-F02**: Mars has no bright North Star. _(Write-up · Exhibit D (No bright North Star))_ ## Write-up Same stars, different sky. Mars sees our constellations, two moons and a blue evening star: Earth. 1. **Barely twinkling**: With an atmosphere only about 1% as dense as Earth's, Mars's stars barely twinkle. 2. **Dust dims the view**: Suspended dust dims stars by about one magnitude overhead and up to four near the horizon. 3. **Same constellations**: Mars is too close to Earth for any visible parallax, so constellations keep their shapes. 4. **No bright North Star**: Mars's axis points between Deneb and Alderamin, near only a faint star. 5. **Earth as evening star**: Curiosity photographed Earth and the Moon in the Martian evening sky in 2014. ## Related case files - [Spacewalker (DD-652)](https://detailenjoyer.com/case/spacewalker/): Another case about seeing space from beyond Earth - [Stellar Birth (DD-037)](https://detailenjoyer.com/case/stellar-birth/): Another case about the stars - [Pluto (DD-125)](https://detailenjoyer.com/case/pluto/): I paired it with another world in our solar system - [Uranus (DD-127)](https://detailenjoyer.com/case/uranus/): I paired it with another planet's unusual days and seasons - [Mars (DD-130)](https://detailenjoyer.com/case/mars/): I linked more about Mars - [Earth (DD-131)](https://detailenjoyer.com/case/earth/): I paired it with another planet ## Reel vs. record - **Note**: 'Constellations... shifted due to Mars' orbital position': the constellations keep their shapes, because Mars is too close to Earth for any visible parallax. What changes is the pole: Mars's axis points between Deneb and Alderamin, so it has no bright North Star. - **Note**: 'Scatters light less, making stars appear sharper': the thin air means stars barely twinkle, but dust dims them by about one magnitude overhead and up to four near the horizon, so they don't look brighter than from a dark site on Earth. - **Note**: 'Dust storms can dim the sky': yes, and even without storms, suspended dust makes twilight last much longer. - **Note**: 'Primarily carbon dioxide': yes, along with nitrogen and argon, and the whole atmosphere is only about 1% as dense as Earth's. - **Missing**: Earth shines as a bright evening or morning star from Mars, and Phobos and Deimos are both visible. Curiosity photographed Earth and the Moon from Mars on January 31, 2014. ## Video: Mars Nights: Same Stars, Different Sky - Duration: 21.4 s · Published: 2025-06-25 - File: https://detailenjoyer.com/assets/videos/DLWQYiSoB3j.mp4 ### Transcript DID YOU KNOW? The night sky on Mars offers a striking view distinct from Earth's. Mars' thin atmosphere, primarily carbon dioxide, scatters light less, making stars appear sharper and more vibrant against a darker backdrop. Constellations familiar to Earth observers remain visible but shifted due to Mars' orbital position. Dust storms can dim the sky, but clear nights reveal a crisp, alien panorama. NOW YOU KNOW! ## Questions & answers **Q: Do the constellations change shape when seen from Mars?** A: There's no visible parallax. _(Source: Write-up · Exhibit A (Barely twinkling) · NASA Science: Mars facts; Astronomy: What do the stars look like from Mars?)_ **Q: What is the main gas in Mars's atmosphere?** A: Along with nitrogen and argon. _(Source: Write-up · Exhibit A (Barely twinkling) · NASA Science: Mars facts; Astronomy: What do the stars look like from Mars?)_ **Q: What dims Martian starlight most?** A: Up to four magnitudes near the horizon. _(Source: Write-up · Exhibit B (Dust dims the view) · Astronomy: What do the stars look like from Mars?; BBC Sky at Night Magazine: What the night sky looks like on Mars)_ **Q: Between which two stars does Mars's north pole point?** A: So there's no bright Martian North Star. _(Source: Write-up · Exhibit B (Dust dims the view) · Astronomy: What do the stars look like from Mars?; BBC Sky at Night Magazine: What the night sky looks like on Mars)_ **Q: Which rover photographed Earth from Mars in January 2014?** A: About 80 minutes after sunset. _(Source: Write-up · Exhibit A (Barely twinkling) · NASA Science: Mars facts; Astronomy: What do the stars look like from Mars?)_ ## Sources - [NASA Science: Mars facts](https://science.nasa.gov/mars/facts/) - [Astronomy: What do the stars look like from Mars?](https://www.astronomy.com/science/what-do-the-stars-look-like-from-mars/) - [BBC Sky at Night Magazine: What the night sky looks like on Mars](https://www.skyatnightmagazine.com/space-science/what-does-night-sky-look-like-mars) - [EarthSky: Is there a North Star for Mars?](https://earthsky.org/astronomy-essentials/mars-north-south-star/) - [NASA/JPL PIA17936: Bright 'evening star' seen from Mars is Earth](https://www.jpl.nasa.gov/images/pia17936-bright-evening-star-seen-from-mars-is-earth) - [Astronomy: Ask Astro: Can Phobos and Deimos be seen from the surface of Mars?](https://www.astronomy.com/science/ask-astro-can-phobos-and-deimos-be-seen-from-the-surface-of-mars/) ## Cite this case file Easterling, Marcus. "Mars Nights." The Detail Department (DetailEnjoyer), case file DD-603, last updated Jun 25, 2025. https://detailenjoyer.com/case/mars-nights/