Timeline of Mars Science Laboratory and related exploratory accomplishments, on the planet Mars. (Videos: "Curiosity" First Five Years (02:07); "Curiosity" POV: Five Years Driving (05:49); "Curiosity" Discoveries About Gale Crater (02:54)) On September 5, 2017, scientists reported that the "Curiosity" rover detected boron, an essential ingredient for life on Earth, on the planet Mars. Such a finding, along with previous discoveries that water may have been present on ancient Mars, further supports the possible early habitability of Gale Crater on Mars. On September 13, 2017, NASA reported that the "Curiosity" rover climbed an iron-oxide-bearing ridge called "Vera Rubin Ridge" (or "Hematite Ridge") and will now
Gliese 687 40% of the Sun's mass and nearly 50% of the Sun's radius. Compared to the Sun, it has a slightly higher proportion of elements with higher atomic numbers than helium. It appears to have a rotation of 60 days and to be somewhat chromospherically active. It displays no excess of infrared radiation that would indicate orbiting dust. It is known to have a planet, Gliese 687 b, with a mass of 18.394 Earth masses (which makes it comparable to Neptune), an orbital period of 38.14 days, and a low orbital eccentricity. Gliese 687 is a solitary red dwarf that emits