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According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...
New Horizons 2: New Horizons 2: N/A N/A NASA: Flyby Cancelled A proposed probe that would've flew by trans-Neptunian objects using a gravity assist from Uranus. [133] 5 Pluto Hop, Skip, and Jump: Pluto Hop, Skip, and Jump: N/A N/A NASA: Lander In progress A proposed probe designed to land on Pluto, similar to the concept of the Triton Hopper ...
The solar system's largest moon, Ganymede, which orbits the largest planet, Jupiter, was hit by an asteroid four billion years ago that shifted the gas giant's satellite on its axis, new research ...
Ganymede's magnetic field is probably created by convection within its core, and influenced by tidal forces from Jupiter's far greater magnetic field. [23] Ganymede has a thin oxygen atmosphere that includes O, O 2, and possibly O 3 . [17] Atomic hydrogen is a minor atmospheric constituent.
Planetary habitability in the Solar System is the study that searches the possible existence of past or present extraterrestrial life in those celestial bodies. As exoplanets are too far away and can only be studied by indirect means, the celestial bodies in the Solar System allow for a much more detailed study: direct telescope observation, space probes, rovers and even human spaceflight.
Fears of a future where artificial intelligence overpowers flesh-and-blood humans have always been a paramount tenet of sci-fi storytelling. And when these sentient robots closely resemble human ...
The weather was mild before the rain began to fall in New York as crowds poured into the square, with one reveler telling CBS News he had arrived at 6 a.m. to get a good view of the ball drop ...
The largest, Ganymede, is the largest moon in the Solar System and surpasses the planet Mercury in size (though not mass). Callisto is only slightly smaller than Mercury in size; the smaller ones, Io and Europa, are about the size of the Moon. The three inner moons — Io, Europa, and Ganymede — are in a 4:2:1 orbital resonance with