Trappist-1f
| TRAPPIST-1f | |
 Konstnärs föreställning av TRAPPIST-1f | |
| Upptäckt | |
|---|---|
| Upptäcktsdatum | 2017 |
| Upptäcktsmetod | Transit |
| Moderstjärna | |
| Moderstjärna | Trappist-1 |
| Stjärnbild | Vattumannen |
| Omloppsbana | |
| Halv storaxel | 0,0371 AE |
| Excentricitet | ≤0,063 |
| Siderisk omloppstid | 9,02 dygn |
| Fysikaliska data | |
| Massa | 0,93 M⊕ |
| Ytgravitation (ekvatorn) | 0,62 g |
| Temperatur | 219 K (-54°C) |
| Hitta fler artiklar om astronomi med | |
Trappist-1f (eller 2MASS J23062928-0502285 f) är en exoplanet som är belägen 39 ljusår från jorden i stjärnbilden Vattumannen. Den har 0,93 gånger jordens massa och en ytgravitation på 0,62 g-krafter. Trappist-1f kretsar runt den röda dvärgen Trappist-1 i den beboeliga zonen, på 9,02 dygn. De är en av fyra Trappist-1 planeter i beboeliga zonen.[1]
Beboelighet
Trappist-1f är i beboeliga zonen av Trappist-1, där vatten kan vara flytande.[2] Den antas ha en bunden rotation runt Trappist-1, vilket betyder att den alltid har samma sida mot sin stjärna, så att ena sidan har permanent dag, medan den andra sidan har permanent natt. Lämpligaste zonen för liv på planeten antas vara mellan de två hemisfärerna, där temperaturen är mer vänlig för liv. Alternativt kan en tät atmosfär bidra till en högre temperatur även på nattsidan, vilket skulle expandera den beboeliga zonen på planeten.
Källor
- ^ https://www.space.com/41714-water-rich-exoplanets-trappist-1-system.html | TRAPPIST-1 Worlds Are Rocky and Rich in Water, New Research Uncovers | September 5, 2018
- ^ https://exoplanets.nasa.gov/news/1419/nasa-telescope-reveals-largest-batch-of-earth-size-habitable-zone-planets-around-single-star/ | NASA telescope reveals largest batch of Earth-size, habitable-zone planets around single star | February 21, 2017
Media som används på denna webbplats
Artist's impression of the exoplanet TRAPPIST-1f, located in the Aquarius system of TRAPPIST-1. Originally created for NASA as part of their announcement of discoveries in the TRAPPIST-1 system on 22 February 2017. According to NASA, both TRAPPIST-1e and TRAPPIST-1f are depicted as "covered in water, but with progressively larger ice caps on the night side." Screenshotted and cropped from File:PIA21468 - TRAPPIST-1 Planets - Flyaround Animation.ogg.
This artist's concept allows us to imagine what it would be like to stand on the surface of the exoplanet TRAPPIST-1f, located in the TRAPPIST-1 system in the constellation Aquarius.
Because this planet is thought to be tidally locked to its star, meaning the same face of the planet is always pointed at the star, there would be a region called the terminator that perpetually divides day and night. If the night side is icy, the day side might give way to liquid water in the area where sufficient starlight hits the surface.
One of the unusual features of TRAPPIST-1 planets is how close they are to each other -- so close that other planets could be visible in the sky from the surface of each one. In this view, the planets in the sky correspond to TRAPPIST1e (top left crescent), d (middle crescent) and c (bright dot to the lower right of the crescents). TRAPPIST-1e would appear about the same size as the moon and TRAPPIST1-c is on the far side of the star. The star itself, an ultra-cool dwarf, would appear about three times larger than our own sun does in Earth's skies.
The TRAPPIST-1 system has been revealed through observations from NASA's Spitzer Space Telescope and the ground-based TRAPPIST (TRAnsiting Planets and PlanetesImals Small Telescope) telescope, as well as other ground-based observatories. The system was named for the TRAPPIST telescope.
NASA's Jet Propulsion Laboratory, Pasadena, California, manages the Spitzer Space Telescope mission for NASA's Science Mission Directorate, Washington. Science operations are conducted at the Spitzer Science Center at Caltech, also in Pasadena. Spacecraft operations are based at Lockheed Martin Space Systems Company, Littleton, Colorado. Data are archived at the Infrared Science Archive housed at Caltech/IPAC. Caltech manages JPL for NASA.
For more information about the Spitzer mission, visit http://www.nasa.gov/spitzer and http://spitzer.caltech.edu.