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Latest Astrodynamics Stories

3ca663f8e4b34f5cd9646966556c925b1
2009-02-20 07:20:00

Experts gathered in Vienna, Austria this week to discuss solutions to deal with vast amount of space junk that is clogging up the Earth's orbit.With a recent satellite collision still fresh on their minds, some suggested that a massive cosmic cleanup is the best way to solve the problem, while others argued that improving information sharing is a better way to address the issue.The informal talks, which arose from concerns about the February 10 collision of a derelict Russian spacecraft and a...

cfdc0b2ba9373285304ebb0c3cea204a1
2009-02-12 10:25:00

Two satellites collided in orbit on Tuesday, prompting NASA to announce it to be the first collision of its kind in space. A US commercially-owned satellite collided with a crippled Russian military satellite in low-earth orbit. The commercial satellite was owned by Bethseda, Maryland-based Iridium Satellite LLC, which characterized the event as "extremely unusual." However, "the Iridium constellation is uniquely designed to withstand such an event, and the company is taking the necessary...

2008-10-10 12:00:07

Orbital Sciences Corporation (NYSE:ORB) announced today that it will release its third quarter 2008 financial results prior to the opening of the market on Thursday, October 16, 2008. Orbital will also conduct a conference call with financial analysts and investors the same morning, beginning at 9:00 a.m. (EDT). The conference call will be hosted by: -- Mr. David W. Thompson, Chairman and Chief Executive Officer -- Mr. Garrett E. Pierce, Vice Chairman and Chief Financial Officer...

2008-10-07 12:00:15

-- Company Signs Long-Term Lease for First Phase of Chandler Expansion Plan That Would Support a 50% Growth in Employment During the Next Decade -- -- Fast-Growing Space Technology Company Also Renewing Lease on Current Facility for Another 11 Years -- Orbital Sciences Corporation Barron Beneski, 703-406-5528 Public and Investor Relations beneski.barron@orbital.com Logo: http://www.orbital.com Orbital Sciences Corporation (NYSE:ORB), one of the world's leading space technology...

2008-08-18 12:00:42

Orbital Sciences Corporation (NYSE:ORB), the world's leading manufacturer of smaller-sized geosynchronous (GEO) communications satellites, announced today that the AMC-21 satellite, which is based on the company's STAR-2 platform, was successfully launched into orbit during a mission that took place on Thursday, August 14, 2008. In conjunction with the program's prime contractor, Thales Alenia Space, Orbital built, integrated and tested the AMC-21 spacecraft for SES Americom. The satellite...

2008-07-31 03:00:36

By Lu, Feng Zhang, Xiaohu; Xu, Jianmin ABSTRACT An automatic image navigation algorithm for Feng Yun 2 (FY2) spin-stabilized geosynchronous meteorological satellites was determined at the National Satellite Meteorological Center (NSMC) of the China Meteorological Administration (CMA). This paper derives the parameters and coordinate systems used in FY2 image navigation, with an emphasis on attitude and misalignment parameters. The solution to the navigation model does not depend on any...

9a702623e443732bbe2b35a80fda3aed1
2008-07-17 08:15:00

Starting this week, spacecraft controllers have been executing a series of maneuvers to gradually bring Venus Express closer to its host planet. In its modified orbit, the spacecraft will be able to observe unexplored regions and investigate phenomena that were not within its reach before. The operational maneuvers to bring the spacecraft closer will be executed through the month of July, settling it into its new orbit by 4 August. Until now, Venus Express has occupied a highly eccentric...

2008-07-10 12:00:09

Orbital Sciences Corporation (NYSE:ORB) announced today that it will release its second quarter 2008 financial results prior to the opening of the market on Thursday, July 17, 2008. Orbital will also conduct a conference call with financial analysts and investors the same morning, beginning at 9:00 a.m. (EDT). The conference call will be hosted by: -- Mr. David W. Thompson, Chairman and Chief Executive Officer -- Mr. Garrett E. Pierce, Vice Chairman and Chief Financial Officer...

2007-12-03 17:20:57

COLUMBIA, Mo. "“ Sending an unmanned spacecraft to the outer fringes of the solar system requires extensive planning. At the University of Missouri, engineers have developed an efficient and highly sophisticated mathematical algorithm (implemented as software) that determines the most efficient path for a spacecraft's journey from point A to point B "“ no matter how many worlds or years away. In testing and validating the algorithm, Craig Kluever, professor of mechanical and...

965b96911c7a28f028b4eed7d8c058dd
2007-03-06 17:35:00

It's the year 2020, and space has never been so busy. Picture this: In Earth orbit, a robotic maintenance ship skitters from one weather satellite to another, upgrading powerful optics that help meteorologists track dangerous storms. Four hundred thousand kilometers away, a cargo ferry arrives at the Moon. It spots an orbiting depot, makes its approach and mates flawlessly, offloading drill heads, solar panels and other supplies for a frontier outpost at the Moon's south pole. Meanwhile,...


Latest Astrodynamics Reference Libraries

22_438736ec75b9bfaca9b25a90d91dcfaa2
2004-10-19 04:45:44

Autumnal Equinox -- In astronomy, is the equinox at the beginning of autumn in the northern hemisphere: the moment when the sun appears to cross the celestial equator, heading southward. The equinox occurs around September 22-24, varying slightly each year according to the 400 year cycle of leap years in the Gregorian Calendar. In the southern hemisphere, the equinox occurs at the same moment, but at the beginning of spring. There are two conventions for dealing with this: either the...

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
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.