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Latest Orbit Stories

2010-04-06 13:57:48

In an analysis of the past 1.2 million years, UC Santa Barbara geologist Lorraine Lisiecki discovered a pattern that connects the regular changes of the Earth's orbital cycle to changes in the Earth's climate. The finding is reported in this week's issue of the scientific journal Nature Geoscience. Lisiecki performed her analysis of climate by examining ocean sediment cores. These cores come from 57 locations around the world. By analyzing sediments, scientists are able to chart the Earth's...

2010-03-10 09:33:33

The Purple Mountain Observatory and the Department of Astronomy, Nanjing University, in Nanjing China-Research, cooperating with the Albert Einstein institute, in Hannover, Germany, put forward a model of the planar co-orbital circular restricted three-body problem, gave the equations of motion, a set of approximation formulas, and an approximate semi-analytical solution. The study is reported in Issue 53, No. 1 of SCIENCE CHINA Physics, Mechanics & Astronomy because of its significant...

2010-01-26 17:47:00

PERTH, Australia, Jan. 26 /PRNewswire-FirstCall/ -- Orbital Corporation Limited (ASX: OEC - "Orbital") announced today that it has reached agreement with the Government of Western Australia, through the Department of Commerce, to restructure the terms and conditions of the long standing loan arrangement between Orbital and the WA Government. The parties entered into a Development Incentives Agreement in 1989 under which Orbital was advanced $19 million, interest free, to be repaid in one...

2009-08-25 07:00:00

EAGAN, Minn., Aug. 25 /PRNewswire/ -- ORBIT Systems, Inc. (ORBIT), a provider of fully-managed computer environments to small and medium-sized businesses in the Twin Cities, is announcing the acquisition of the assets of Voyageur IT, an online branding, web design and search engine optimization firm based in St. Paul. Voyageur IT, founded in 1996, has developed award-winning websites and helped build successful businesses through the thoughtful use of online tools. Clients of Voyageur...

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2009-05-26 14:40:13

ESA's gravity mission GOCE has achieved a first in the history of satellite technology. The sophisticated electric propulsion system has shown that it is able to keep the satellite completely free from drag as it cuts through the remnants of Earth's atmosphere "“ paving the way for the best gravity data ever. Volker Liebig, ESA's Director of Earth Observation Programs commented, "I am very pleased to see another world premier by GOCE, after having already demonstrated the most sensitive...

2009-03-13 23:04:58

A U.S. study suggests women often choose to opt out of math-intensive careers because they need more flexibility to tend to family demands. The Cornell University report said women with advanced math abilities choose non-math fields more often than men with similar abilities. A major reason explaining why women are underrepresented not only in math-intensive fields but also in senior leadership positions in most fields is that many women choose to have children, and the timing of child...

2009-03-07 00:55:00

CAPE CANAVERAL, Fla./>, March 7/> /PRNewswire-USNewswire/ -- NASA's Kepler mission successfully launched into space from Cape Canaveral Air Force Station, Fla., aboard a United Launch Alliance Delta II at 10:49 p.m. EST/>, Friday. Kepler is designed to find the first Earth-size planets orbiting stars at distances where water could pool on the planet's surface. Liquid water is believed to be essential for the formation of life. (Logo: /Photo:...

2008-08-19 21:00:08

By CARLA K. JOHNSON CHICAGO - Can you chew gum and recover from surgery at the same time? British researchers say it's a great idea for some patients. Chewing gum may speed the return of normal bowel function after colon surgery, a new analysis of five studies suggests. Some patients have trouble moving their bowels after colon surgery but chewing gum may fool the body into good digestion. Gum gets the juices flowing, literally. Besides saliva, it may stimulate gut hormones and...

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2006-12-04 13:50:00

It's 2015. You're NASA's chief engineer designing a moonbase for Shackleton Crater at the Moon's south pole. You're also designing a com-system that will allow astronauts constant radio contact with Earth. But you know that direct transmissions won't work--not always. As seen from Shackleton Crater, Earth is below the horizon for two to three weeks each month (depending on the base's location). This blocks all radio signals, which travel line of sight. The solution seems obvious. Simply place...

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2004-11-27 08:00:00

A key prediction of Albert Einstein's general theory of relativity has been confirmed by an experiment showing that the Earth's rotation drags the surrounding fabric of space-time along with it. The phenomenon, known as frame-dragging, was one of the last untested predictions of general relativity. A NASA satellite, Gravity Probe B, was launched this year to test the same effect. "Frame-dragging is like what happens if a bowling ball spins in a thick fluid, such as molasses," said Errico C....


Latest Orbit Reference Libraries

9_4e0ee555c18ad7f31f4e1417f556ae6a2
2004-10-19 04:45:44

Satellite -- A satellite is an object that orbits another object. With sufficient tangential velocity, the object does not collide with the primary object it orbits, but maintains a distance from that object as the rate at which it falls towards that object is similar to the rate that it travels away, thus the object orbits the primary object and becomes a satellite. In other words: gravitational force serves as the centripetal force needed to make the object circle the primary...

8_1e2e2011b36872dcb4753873588746382
2004-10-19 04:45:44

Lagrangian Point -- In Lagrangian mechanics, a Lagrangian point (or L-point) is one of five positions in space where the gravitational fields of two bodies of substantial but differing mass combine to form a point at which a third body of negligible mass would be stationary relative to the two bodies. Bodies at the L-point will not move relative to the parent bodies if they are not perturbed by other gravitational forces. They are sometimes also referred to as libration points. The...

8_d7f84ec36dbfda23aff1a01e00a4b5e62
2004-10-19 04:45:44

Kepler's Laws of Planetary Motion -- The astronomer Johannes Kepler's main contribution to astronomy was his three laws of planetary motion. Kepler found these laws empirically by studying extensive observations recorded by Tycho Brahe. He found the first two laws in 1609 and the third one in 1618. Isaac Newton was later able to derive the laws from his laws of motion and gravity, thereby producing strong evidence in favor of Newton's inverse-square gravitational law. Kepler's First...

6_15cc05865f89c4801c5ff2a85d74a93c2
2004-10-19 04:45:42

Orbit -- An orbit is the path that an object makes around another object under the influence of some force. The classical example is that of the solar system, where the Earth, other planets, asteroids, comets, and smaller pieces of rubble are in orbit around the Sun; and moons are in orbit around planets. These days, many artificial satellites are in orbit around the Earth. Understanding orbits There are a few common ways of understanding orbits. -- As the object moves, it...

6_e1c9b89b48eaf2af7055b7bbebf1a19c2
2004-10-19 04:45:41

Escape Velocity -- An escape velocity is the minimum speed at which an object without propulsion can move away from a source of a gravitational field indefinitely if there is no friction. This definition may need modification for the practical problem of two or more sources in some cases. In any case, the object is assumed to be a point with a mass that is negligible compared with that of the source of the field, usually an excellent approximation. It is commonly described as the speed...

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Word of the Day
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
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