Reference Article

from Wikipedia, the free encyclopedia

General relativity

General relativity (GR) is the geometrical theory of gravitation published by Albert Einstein in 1915.

It unifies special relativity and Sir Isaac Newton's law of universal gravitation with the insight that gravitation is not due to a force but rather is a manifestation of curved space and time, with this curvature being produced by the mass-energy and momentum content of the spacetime.

General relativity is distinguished from other metric theories of gravitation by its use of the Einstein field equations to relate spacetime content and spacetime curvature.

General relativity is currently the most successful gravitational theory, being almost universally accepted and well confirmed by observations.

The first success of general relativity was in explaining the anomalous perihelion precession of Mercury.

Then in 1919, Sir Arthur Eddington announced that observations of stars near the eclipsed Sun confirmed general relativity's prediction that massive objects bend light.

Since then, many other observations and experiments have confirmed many of the predictions of general relativity, including gravitational time dilation, the gravitational redshift of light, signal delay, and gravitational radiation.

In addition, numerous observations are interpreted as confirming the weirdest prediction of general relativity, the existence of black holes.

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

See the following related content on ScienceDaily:


Related Videos

last updated on 2014-07-29 at 3:53 pm EDT

Meant to Fly? The World's First-Solar Powered Airplane

Meant to Fly? The World's First-Solar Powered Airplane

FORA.tv (Feb. 13, 2013) — Solar Impulse is a Swiss solar-powered airplane that will endeavor to fly around the world without fuel. After achieving the world's first solar night to day flight in 2010 and the first intercontinental flight connecting Switzerland to Morocco in 2012, a coast-to-coast flight across the United States is planned for the summer of 2013. In honor of the two visiting pioneers piloting this innovative airplane, Bertrand Piccard and Andrι Borschberg, swissnex San Francisco and the Consulate General of Switzerland are pleased to invite you to a reception and briefing on Solar Impulse. Join them to learn how the Solar Impulse project is making leaps in new materials, energy and weight optimization, even production processes, and how it is setting new milestones in aviation history. All of that while serving as an ambassador of renewable energy
Powered by NewsLook.com
Methane Hydrate Gas Could Be Game Changer: Analyst

Methane Hydrate Gas Could Be Game Changer: Analyst

Russia Today (Mar. 14, 2013) — Christoph Frei, the General Secretary of the World Energy Council, says methane hydrate gas may become a game changer if technology picks up.
Powered by NewsLook.com
Ryder Opens Two Natural Gas Fueling Stations in California

Ryder Opens Two Natural Gas Fueling Stations in California

Business Wire (July 11, 2013) — Ryder System, Inc. (NYSE: R), a leader in commercial transportation and supply chain management solutions, announced today that it has opened the first natural gas fueling stations in its North American network to serve both the general public and Ryder lease and rental customers.
Powered by NewsLook.com
How Does Climate Change Fuel Conflict?

How Does Climate Change Fuel Conflict?

Thomson Reuters Foundation (June 22, 2011) — Dan Smith, secretary-general of International Alert, unravels the "consequences of the consequences" of global warming.
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

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