Heroes of Space: Clyde Tombaugh
The existence of a planet beyond Neptune had been predicted by prominent American astronomer, Percival Lowell in 1905 but it was never proven in his lifetime. He had aimed a 40-inch reflector telescope at what he believed to be the right section of the sky, but he died in 1916 with his dream of discovering his so-called Planet X sadly unrealised.
Hubble has been watching Neptune’s enormous storm come back …
2019年3月26日 · The new findings show how Neptune’s Great Dark Spots differ from Jupiter’s Great Red Spot. The Great Red Spot has been observed since at least 1830 and could be up to 350 years old. Thin jet streams on Jupiter keep the Great Red Spot from breaking apart and from changing latitude; it rotates around Jupiter but doesn’t move north or south.
Neptune-size exomoon candidate may be the captured core of a …
2019年10月3日 · These two latter worlds got gas-gobbling head starts, the idea goes, and, rather than gravitationally capture Neptune and Uranus, booted the duo outward toward their present locales. Indeed, this process may help explain the abundance of Neptune-mass worlds in the Milky Way galaxy, which appears to exceed that predicted by traditional planet ...
Enceladus’ ‘fountains’ power up farther from Saturn - All About …
During a recent stargazing session, NASA’s Cassini spacecraft watched a bright star pass behind the plume of gas and dust that spews from Saturn’s icy moon Enceladus.
Found: First evidence for water ice clouds outside Solar System
We know that clouds laden with water ice exist in the confines of our Solar System on giant planets Jupiter, Saturn, Uranus and Neptune. However, this is the furthest from our Sun that we’ve been able to detect water-based clouds up until now. All About Space magazine is available every month for just £3.99.
heat - spaceanswers.com
The Website for All About Space Magazine. Why is the furthest planet from the Sun, Neptune, warmer than Uranus?
TESS Update: Spacecraft discovers planet ‘missing from our Solar …
2019年7月29日 · In our own Solar System, there are either small, rocky planets like Earth, Mercury, Venus, and Mars, or much larger planets like Saturn, Jupiter, Uranus, and Neptune that are dominated by gases rather than land. We don’t have planets about half the size of Neptune, though these are common around other stars.
What are trans-neptunian objects? - All About Space
2013年1月29日 · Any object in our Solar System that orbits the Sun at a greater average distance than Neptune is known as a trans-Neptunian object (TNO). The most famous TNO is the dwarf planet Pluto which was discovered in 1930, over 60 years before any other TNOs were found.
Why hasn’t gravity rounded off Miranda’s jagged surface?
Uranus’ moon, Miranda, is too small for gravity to have rounded off the jagged surface. It is believed that Miranda is an ice moon, with 1,000 times less mass than the Earth’s Moon. In its past, tidal heating due to the extremes of its orbit allowed the interior ice to melt, and behave in a similar geological way to the crust and mantle on ...
Astronomers find small Neptunes orbiting “in step” around star
2016年5月13日 · Astronomers from the University of Chicago and University of California, Berkeley, are particularly interested in this stellar system because our system’s four giant planets – Jupiter, Saturn, Neptune and Uranus – are thought to have once been in resonant orbits that were disrupted sometime during their 4.5-billion-year history.