Does Callisto have an atmosphere?
Atmosphere. Scientists announced in 1999 that the Galileo spacecraft detected a very thin carbon dioxide exosphere—an extremely thin atmosphere—on Callisto during its observations in 1997. More recent research indicates Callisto also has oxygen and hydrogen in its exosphere.
What is the size of Callisto?
1,497.7 miCallisto / Radius
Is there gravity on Callisto?
1.236 m/s²Callisto / Gravity
Where is Callisto?
Callisto is the outermost orbiting Galilean moon of Jupiter, with its orbiting distance approximately 1,880,000 km. The orbit distance of Callisto is bigger than the orbit radius of Ganymede which is 1,070,000 km.
Does Callisto have impact craters?
Gomul Catena There are eight prominent crater chains on Callisto. They probably formed by the impact of comets that were tidally disrupted by the planet Jupiter, like the split comet Shoemaker-Levy 9 in 1992-1994.
How strong is Ganymede’s magnetic field?
∼750 nT.
The data are consistent with a Ganymede-centred magnetic dipole tilted by ∼10° relative to the spin axis, and an equatorial surface-field strength of ∼750 nT. The magnetic field is strong enough to carve out a magnetosphere with clearly defined boundaries within Jupiter’s magnetosphere.
What is Ganymede’s surface like?
Spacecraft images of Ganymede show its surface is a mix of two types of terrain. Forty percent of the surface is covered by highly cratered dark regions, and the remaining sixty percent is covered by a light grooved terrain, which forms intricate patterns across the moon.
How fast does Io orbit Jupiter?
1.77 Earth-days
Io takes 1.77 Earth-days to orbit Jupiter.
What is the meaning of Callisto?
Definition of Callisto : a nymph loved by Zeus, changed into a she-bear by Hera, and subsequently changed into the Great Bear constellation.
Has Another Earth been found?
The Kepler space telescope identified the exoplanet, and its discovery was announced by NASA on 23 July 2015. The planet is about 1,800 light-years (550 pc) away from the Solar System….Kepler-452b.
| Discovery | |
|---|---|
| Star | Kepler-452 |
| Physical characteristics | |
| Mean radius | 1.5 +0.32 −0.22 R Earth |
| Mass | 5 ± 2 M Earth |