In astronomy, an inner moon or inner natural satellite is a natural satellite following a prograde, low-inclination orbit inwards of the large satellites...

moonlets thought to be shed from the inner moons, nor hundreds of possible kilometer-sized outer irregular moons that were only briefly captured by telescopes...

seven inner moons, which follow circular prograde orbits lying in the equatorial plane of Neptune. The second group consists of all nine other moons including...

initially discovered three small inner moons: Methone and Pallene between Mimas and Enceladus, and the second trojan moon of Dione – Polydeuces. It also...

Uranus's moons are divided into three groups: thirteen inner moons, five major moons, and ten irregular moons. The inner and major moons all have prograde...

uniquely for a large moon, has a retrograde orbit, suggesting it was a dwarf planet that was captured. Neptune also has seven known inner regular satellites...

also known as Neptune VIII, is the second-largest Neptunian moon, and Neptune's largest inner satellite. Discovered by Voyager 2 in 1989, it is named after...

Each day, the inner moon is an additional 0.25° farther around Saturn than the outer moon. As the inner moon catches up to the outer moon, their mutual...

one Earth day. Due to its unusually close distance to Neptune's largest inner moon Proteus, it has been hypothesized that Hippocamp may have accreted from...

Galatea /ɡæləˈtiːə/, also known as Neptune VI, is the fourth-closest inner moon of Neptune. It is named after Galatea, one of the fifty Nereids of Greek...

Despina /dɛˈspaɪnə/, also known as Neptune V, is the third-closest inner moon of Neptune. It is named after Greek mythological character Despoina, a nymph...

largest inner moon of Uranus, orbiting inside the orbit of Miranda. It is intermediate in size between Portia (the second-largest inner moon) and Miranda...

retrograde orbit, which is opposite to the orbital motion of the next inner moon, Iapetus. Inwardly migrating ring material would thus strike Iapetus's...

Each day, the inner moon is an additional 0.25° farther around Saturn than the outer moon. As the inner moon catches up to the outer moon, their mutual...

Sheppard) Archival Hubble Images Reveal Neptune's "Lost" Inner Moon (SETI : October 8, 2013) Neptune Moon Dance (animation) on YouTube from NASA Jet Propulsion...

Exomoon – Moon beyond the Solar System Inner moon – Natural satellite orbiting inside the orbit of a larger moon Irregular moon – Captured satellite following...

Namaka is the smaller, inner moon of the trans-Neptunian dwarf planet Haumea. It is named after Nāmaka, the goddess of the sea in Hawaiian mythology and...

2017). "Stunning close-up of Saturn's moon, Pan, reveals a space empanada". Science. "Here's Why Saturn's Inner Moons Are Shaped Like Ravioli and Potatoes"...

Perdita. The inner moon system is unstable over timescales of several millions of years. Belinda and Cupid will probably be the first pair of moons to collide...

size of the Moon. The three inner moons — Io, Europa, and Ganymede — are in a 4:2:1 orbital resonance with each other. While the Galilean moons are spherical...

R.; de Pater, I.; Lissauer, J. J.; French, R. S. (2019). "The seventh inner moon of Neptune" (PDF). Nature. 566 (7744): 350–353. Bibcode:2019Natur.566...

R.; de Pater, I.; Lissauer, J. J.; French, R. S. (2019). "The seventh inner moon of Neptune". Nature. 566 (7744): 350–353. Bibcode:2019Natur.566..350S...

magnetosphere 4 billion years ago. Mars has two tiny moons: Phobos and Deimos. Phobos is Mars's inner moon. It is a small, irregularly shaped object with a...

170,000 square kilometers, or somewhere near 130,000. Like all other inner moons of Jupiter, it is tidally locked with the planet, with the long axis...

be perturbed. Despite this, it has the least stable orbit of Uranus's inner moons — it is likely to collide with Belinda in the next 100,000–10 million...

Jupiter XV, is the second by distance, and the smallest of the four inner moons of Jupiter. It was discovered in photographs taken by Voyager 2 in 1979...

kilometres (31 mi) thick. The Moon is the second-densest satellite in the Solar System, after Io. However, the inner core of the Moon is small, with a radius...

of Jupiter's moons Ganymede, Europa and Io, and the 2:3 resonance between Neptune and Pluto. Unstable resonances with Saturn's inner moons give rise to...

belt object, or that it was an inner moon in the past and was perturbed during the capture of Neptune's largest moon Triton. If the latter is true, it...

Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is...