Neptunesize compared toEarth Neptunedistance from theSunand orbital eccentricity Neptune’s Great Dark Spot The Great Dark Spot in the southern atmosphere of Neptune was first discovered in 1989 by the Voyager 2 spacecraft. It was an incredibly large rotating storm system with winds of up to 1,...
It is always hard for a small fish to live in a big pond.Pluto's recent departure(离开)from the classical planet family clearly proves that size really matters. Astronomers voted on August 24 to create the first scientific definition of the word
Compared to Neptune and Uranus, the alien world's closest counterparts in our own solar system in terms of mass, HAT-P-26b likely formed either closer to its host star or later in the development of its planetary system, or both. The discovery of an atmosphere with this composition on thi...
Uranus is visually quite bland, while Neptune's high winds come with notable weather phenomena. The Great Dark Spot, a cyclonic storm system the size of Eurasia, was captured by Voyager 2 in the 1989 flyby. The storm resembled the Great Red Spot of Jupiter, but was shown to have ...
Neptune is the smallest of the 4 gas planets (Saturn, jupiter, uranus and of course Neptune) NEPTUNE! Great Dark Spot! Not rated yetNeptune is the COLDEST PLANET! It has a spot named the Great Dark Spot. It is the same size as Earth! It seemed to have disappeared Neptune must have ...
(527 miles) less than its diameter at the equator. Although Neptune occupies a little less volume than Uranus, owing to its greater density—1.64 grams per cubic cm, compared with about 1.3 for Uranus—Neptune’s mass is 18 percent higher. For additional orbital and physical data about ...
Neptune retrograde in transit is a regular cycle lasting 160 days yearly during opposition to the Sun. As with all outer planets, it causes less concern than the rarer inner planet retrogrades. Neptune retrogrades 40% of the time compared to Mars at 9% and Venus at only 7% of the time....
times closer to its star than Venus is to the Sun). The two planets are of similar density, possibly corresponding to a composition of about half of rocky and metallic material and half of water. This makes them about half as rocky as Earth or Venus but also far rockier thanUranusor...
Magnetospheric scientists compared Neptune's field with that of Uranus, which is tilted 59° from the rotation axis, with a center that is offset by 0.3 Uranus radii. After Voyager 2 passed Uranus in January 1986, some scientists thought they might have seen the planet as its magnetic field ...
. Therefore, in spite of being a likely Neptune/sub-Neptune, or even a super-Earth progenitor, V1298 Tau b possesses an atmosphere that is 100–1,000× depleted in metal compared with Neptune and Uranus. The atmospheric metallicity in Fig.3has been shown with respect to stellar metallicity...