User:MRaimondi
~HOLA~
[edit]Stuff I like
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Hello, My name is Marcus. I am 15 and I go to the Gwinnett School of Mathematics, Science, and Technology. I have used wikipedia extensively. I used to edit alot but... I forgot my old account. Now, i am just getting back into wikipedia. I still have alot to learn and I want to continue improving wikipedia.
Ganymede is a moon of Jupiter and the largest and most massive satellite in the Solar System. It is the largest Solar System object without a substantial atmosphere and also the only moon in the Solar System with a substantial magnetic field. Like Titan, Saturn's largest moon, it is larger than the planet Mercury but, due to its lower density, has somewhat less surface gravity than Mercury, Io, or the Moon. Ganymede is composed of silicate rock and water in approximately equal proportions. It is a fully differentiated body, with an iron-rich liquid core and an internal ocean. Ganymede orbits Jupiter in roughly seven days and is in a 1:2:4 orbital resonance with Europa and Io. This image, a composite of three photographs taken by the NASA space probe Juno during a flyby in 2021, depicts the northern hemisphere of Ganymede roughly centered around the prime meridian.Photograph credit: NASA / JPL-Caltech / SwRI / MSSS / Kevin M. Gill
 ERIS IS AWESOMER THAN MOST THINGS EXCEPT A FEW . Hubble Space Telescope. | |||||||||
| Discovery | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Discovered by | M. E. Brown, C. A. Trujillo, D. L. Rabinowitz[1] | ||||||||
| Discovery date | October 21, 2003[1] | ||||||||
| Designations | |||||||||
Designation | 136199 Eris | ||||||||
| 2003 UB313[2] | |||||||||
| dwarf planet TNO (scattered disc object) | |||||||||
| Orbital characteristics | |||||||||
| Epoch March 6, 2006 (JD 2453800.5)[3] | |||||||||
| Aphelion | 97.56 AU 14.60×109km | ||||||||
| Perihelion | 37.77 AU 5.65×109 km | ||||||||
| 67.6681 AU 10.12×109 km | |||||||||
| Eccentricity | 0.44177 | ||||||||
Average orbital speed | 3.436 km/s | ||||||||
| 197.63427° | |||||||||
| Inclination | 44.187° | ||||||||
| 35.8696° | |||||||||
| Known satellites | 1 | ||||||||
| Physical characteristics | |||||||||
Equatorial radius | 1,200 ± 50 km 0.19 Earths | ||||||||
| Mass | (1.66 ± 0.02)×1022 kg[4] | ||||||||
Mean density | 2.3 g/cm3 | ||||||||
| ~0.8 m/s2 | |||||||||
| > 8 h? | |||||||||
| Albedo | 0.86 ± 0.07 | ||||||||
| |||||||||
| 18.7 | |||||||||
| −1.12 ± 0.01 | |||||||||
- ^ a b Staff (May 1, 2007). "Discovery Circumstances: Numbered Minor Planets". IAU: Minor Planet Center. Retrieved 2007-05-05.
- ^ Staff (February 29, 2004). "Minor Planet Designations". IAU: Minor Planet Center. Retrieved 2007-05-05.
- ^ Asteroid Observing Services
- ^ M.E. Brown and E.L. Schaller (2007). "The Mass of Dwarf Planet Eris". Science. 316 (5831): 1585. doi:10.1126/science.1139415.