Reference Article

from Wikipedia, the free encyclopedia

Neptune

Neptune is the eighth and outermost planet in our solar system.

It is the fourth-largest planet by diameter and the third-largest by mass;

Neptune is 17 times the mass of Earth and is slightly more massive than its near twin Uranus which is 14 Earth Masses, but slightly smaller due to its higher density.

Neptune's atmosphere is primarily composed of hydrogen and helium, with traces of methane that account for the planet's blue appearance.

Neptune's blue colour is much more vivid than that of Uranus, which has a similar amount of methane, so an unknown component is presumed to cause Neptune's intense color.

Neptune also has the strongest winds of any planet in the solar system, with estimates as high as 2,500 km/h or 1,500 mph.

Note: This article excerpts material from the Wikipedia article "Neptune", which is released under the GNU Free Documentation License.

See the following related content on ScienceDaily:


Related Videos

last updated on 2015-01-31 at 3:49 am EST

What's Up for February 2014

What's Up for February 2014

NASA (Feb. 3, 2014) Music. Jane Houston Jones: What's Up for February. See all the planets, plus mission updates from comet and asteroid missions Dawn and Rosetta. Hello and welcome. I'm Jane Houston Jones at NASA's Jet Propulsion Laboratory in Pasadena, California. In the evening sky, Mercury and Jupiter are visible to the unaided eye, but you'll need binoculars or telescopes to spot Uranus and Neptune. Mars rises before midnight, joining Jupiter as they gracefully arc from east to west. Spot Mercury and Venus in the southeast sky before dawn, and Mars and Saturn higher in the morning sky. Video provided by NASA
Powered by NewsLook.com
Water Discovery On Small Planet Could Be Key To Earth 2.0

Water Discovery On Small Planet Could Be Key To Earth 2.0

Newsy (Sep. 25, 2014) Scientists have discovered traces of water in the atmosphere of a distant, Neptune-sized planet. Video provided by Newsy
Powered by NewsLook.com
What Do Celestial Objects Sound Like?

What Do Celestial Objects Sound Like?

Buzz60 (Nov. 14, 2014) Patrick Jones (@Patrick_E_Jones) walks us through audio of what celestial objects like Jupiter, Neptune, Earth, Uranus, interstellar space and others sound like. Video provided by Buzz60
Powered by NewsLook.com
New Planets Could Be Lurking Far Beyond Neptune

New Planets Could Be Lurking Far Beyond Neptune

Newsy (Jan. 21, 2015) Scientists say planets located beyond Neptune could be altering the orbits of objects in the farthest reaches of our solar system. Video provided by Newsy
Powered by NewsLook.com

Related Stories


Share This



Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins