﻿ "Orbits" related terms, short phrases and links

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### DefinitionsUpDw('Definitions','-Abz-');

1. Orbits are either circular, with the planet at the center of the circle, or elliptical, with the planet at one focus of the ellipse. (Web site)
2. Orbits are nearly elliptical or circular in shape and are very closely approximated by Kepler's laws of planetary motion.
3. Orbits were first analysed mathematically by Kepler who formulated his results in his laws of planetary motion. (Web site)
4. Orbits were first analyzed mathematically by Johannes Kepler who formulated his results in his three laws of planetary motion.
5. Orbits are ellipses, so, naturally, the formula for the distance of a body for a given angle corresponds to the formula for an ellipse in polar coordinates.

### Semi-Major AxisUpDw('SEMI-MAJOR_AXIS','-Abz-');

1. The squares of the orbital periods of planets are directly proportional to the cubes of the semi-major axis of the orbits. (Web site)

### HyperbolasUpDw('HYPERBOLAS','-Abz-');

1. Newton also predicted that orbits in the shape of hyperbolas should be possible, and he was right. (Web site)

### StarUpDw('STAR','-Abz-');

1. However, due to our constantly changing vantage point from the Earth as it orbits the Sun, the apparent rotation of the star at its equator is about 28 days. (Web site)
2. This "hot-Jupiter" planet is a gas giant similar to Jupiter, but it orbits very close to its scorching star, circling the star once every 4.6 days.
3. It was found on 16 May 2008 and orbits its star every 95.274 days, a little longer than Mercury takes to go round the Sun.

### Parent StarUpDw('PARENT_STAR','-Abz-');

1. Hot Jupiters must therefore form far from their star and subsequently migrate inwards to orbits much closer to the parent star. (Web site)
2. HAT-P-1 is an oddball planet, since it orbits its parent star at just one-twentieth of the distance that separates Earth from our own sun.
3. They travel around their parent star in paths called orbits.

### ObjectsUpDw('OBJECTS','-Abz-');

1. While Pluto orbits in the Kuiper Belt along with at least 700 other objects, Eris also has an eccentric and highly inclined (44°) orbit.
2. Bromley and Kenyon predicted locations in our solar system where captured objects would be, based on the angle and shape of their orbits.
3. It resembles the orbits of objects predicted to lie in the hypothetical Oort cloud - a distant reservoir of comets. (Web site)

### Outer Solar SystemUpDw('OUTER_SOLAR_SYSTEM','-Abz-');

1. Caption: In this schematic of the outer solar system, "Trojan" asteroids can be seen sharing the orbits of Jupiter and Neptune.
2. The Centaurs are a transient population of small bodies in the outer solar system whose orbits are strongly chaotic.

### ObservationsUpDw('OBSERVATIONS','-Abz-');

1. These laws were essentially a set of equations and observations that helped advance our knowledge of the orbits of celestial bodies.
2. Without these complete series of observations of unprecedented accuracy, Kepler could not have discovered that planets move in elliptical orbits. (Web site)
3. It takes years of repeated observations to gather reliable evidence for planets traveling the longer orbits at much greater distances from a star. (Web site)

### Tycho BraheUpDw('TYCHO_BRAHE','-Abz-');

1. He concluded, based on Tycho Brahe 's observations of the orbit of Mars, that the orbits were ellipses. (Web site)
2. As far as the shape of the orbits goes, the "upgrade" came with Johannes Kepler who used very accurate data extracted by Tycho Brahe. (Web site)
3. His work led to the modern laws of planetary orbits, which he developed using his physical principles and the planetary observations made by Tycho Brahe. (Web site)

### AstronomersUpDw('ASTRONOMERS','-Abz-');

1. Astronomers know the orbits of some comets well enough (through observations) to predict when they will return.
2. These orbits have not coincided however, with more recent discoveries by astronomers of objects beyond Neptune.
3. Leuschner was an educator of other astronomers, and also calculated the orbits of asteroids and comets.

### Perfect CirclesUpDw('PERFECT_CIRCLES','-Abz-');

1. Aristotle said that the Earth was the center of the Universe and everything rotated around it in orbits that were perfect circles.
2. He started by assuming the common belief that the orbits of the planets were perfect circles. (Web site)
3. At the time, this was a radical claim; the prevailing belief (particularly in epicycle-based theories) was that orbits should be based on perfect circles.

### Kirkwood GapUpDw('KIRKWOOD_GAP','-Abz-');

1. The Hungaria group is separated from the main body by the 4:1 Kirkwood gap and their orbits have a high inclination. (Web site)
2. At these orbital distances, a Kirkwood gap occurs as they are swept into different orbits.

### Kirkwood GapsUpDw('KIRKWOOD_GAPS','-Abz-');

1. Jupiter's gravitational influence also results in Kirkwood gaps in the asteroid belt, orbits cleared by orbital resonance. (Web site)
2. Cyan arrows point to the Kirkwood gaps, where orbital resonance s with Jupiter destabilize orbits.

### Main Belt AsteroidsUpDw('MAIN_BELT_ASTEROIDS','-Abz-');

1. Hermione is a Cybele asteroid and orbits beyond most of the main belt asteroids.

### Inner PlanetsUpDw('INNER_PLANETS','-Abz-');

1. If this is the case, we would still detect gravitational perturbations in the orbits of the inner planets.

1. The inclination is 0 for prograde orbits, and π for retrograde orbits.
2. By 1 May 2009, astronomers had identified a mere 20 asteroids in retrograde orbits. (Web site)
3. Satellites in retrograde orbits rotate in the opposite orbital sense relative to the earth, so for retrograde orbits the inclination lies between 90.degree. (Web site)

### Long-Period CometsUpDw('LONG-PERIOD_COMETS','-Abz-');

1. There are two basic types of comet: short-period comets, with orbits less than 200 years, and long-period comets, with orbits lasting thousands of years.
2. Because no planets have retrograde orbits, we must ask why so many long-period comets are retrograde, while few short-period comets are. (Web site)
3. Long-period comets have highly eccentric (elongated) orbits and periods ranging from 200 years to thousands or even millions of years. (Web site)

### Geosynchronous SatellitesUpDw('GEOSYNCHRONOUS_SATELLITES','-Abz-');

1. Thus, frequent corrections to their orbits are needed to keep geosynchronous satellites in their assigned places.
2. Geosynchronous satellites which maintain circular orbits around the earth are first launched into highly elliptical orbits with apogees of 22,237 miles.
3. Geosynchronous satellites that are in circular orbits over the equator are called geostationary satellites. (Web site)

### Central BodyUpDw('CENTRAL_BODY','-Abz-');

1. However, in practice, orbits are affected or perturbed, by forces other than gravity due to the central body and thus the orbital elements change over time.
2. This means the track of the satellite, as seen from the central body, will repeat exactly after a fixed number of orbits.
3. As a vehicle falls towards periapsis in any orbit (closed or escape orbits) the velocity relative to the central body increases. (Web site)

### Equal TimesUpDw('EQUAL_TIMES','-Abz-');

1. In such orbits both and r are constant so that equal areas are swept out in equal times by the line joining a planet and the sun. (Web site)

### StabilityUpDw('STABILITY','-Abz-');

1. The size and stability of electron orbits about the nuclei of atoms depends on the ratio of the electron mass to the proton mass.
2. The LAGEOS satellites are able to determine positions of points on the Earth with extremely high accuracy due to the stability of their orbits. (Web site)
3. Thus the Solar System, through an intricate process of mutual adjustment, maintains its basic configurations of orbits, and its stability. (Web site)

### Periodic OrbitsUpDw('PERIODIC_ORBITS','-Abz-');

1. In a finite space, the twins can both be on inertial, periodic orbits so that they have the opportunity to compare their ages when their paths cross.
2. The classical Dirichlet criterion on the stability of equilibria in Hamiltonian systems is generalized to the orbital stability of periodic orbits.
3. Examples of such qualitative properties are numbers of fixed points and periodic orbits (but not their periods). (Web site)

### CircleUpDw('CIRCLE','-Abz-');

1. Satellites may circle the earth at any distance outside the atmosphere; their orbits may have any radius. (Web site)
2. Taking over the traditions of the single-sitter "Vostok", multi-sitter "Voskhod" and "Soyuz" spacecraft began to circle around the orbits of the Earth. (Web site)
3. And they all circle very close to their parent stars, following orbits that range from about 3.2 to 4.9 days.

### CirclesUpDw('CIRCLES','-Abz-');

1. Johan Kepler showed later that the orbits of the planets are far closer to ellipses than to circles. (Web site)
2. A circle has zero eccentricity, and most of the planets have orbits which are nearly circles.
3. Pictures of the Solar System tend to show all the orbits of the planets as circles centered on the Sun (see image at left). (Web site)

### AsteroidsUpDw('ASTEROIDS','-Abz-');

1. Distribution and Kirkwood gaps (from asteroid) About 95 percent of the known asteroids move in orbits between those of Mars and Jupiter.
2. A large number of asteroids have orbits between the orbits of Mars and Jupiter, roughly 2 to 4 AU, in a region known as the Main belt. (Web site)
3. In the Solar System, planets, asteroids, comets and space debris have elliptical orbits around the Sun, relative to the Sun. (Web site)

### Near-Earth AsteroidsUpDw('NEAR-EARTH_ASTEROIDS','-Abz-');

1. Near-Earth asteroids are small solar system objects whose orbits around the sun may bring them close to Earth.
2. Near-earth asteroids, those whose orbits take them inside the orbit of Mars.
3. Three other near-Earth asteroids, (54509) 2000 PH5, (85770) 1998 UP1 and 2002 AA29, which exist in orbits similar to Cruithne's, have since been discovered.

### TravelUpDw('TRAVEL','-Abz-');

1. The orientation is referenced to the direction of travel of the space craft as it orbits a planetary body.
2. For networks having inclined orbits (e.g., FIGS. 1, 2), geosynchronous satellites can travel into and out of communication range of ground-based equipment. (Web site)
3. In addition to the near-Earth asteroids, discussed above, some objects are known to travel in orbits that extend far inside or outside the main belt.

### Inclined OrbitsUpDw('INCLINED_ORBITS','-Abz-');

1. Inclined orbits are virtually all orbits except those that travel directly above the equator or directly over the north and south poles.
2. For inclined orbits, the advance of perigee can be suppressed by setting the inclination, i, at either 63.435 or 116.565°. (Web site)
3. The satellites are placed in a plurality of inclined orbits about the earth. (Web site)

### EccentricityUpDw('ECCENTRICITY','-Abz-');

1. The eccentricity of the orbits is represented by segments (extending from the perihelion to the aphelion) with the inclination represented on Y axis. (Web site)
2. They move along the orbits with a semimajor axis near 4.0 AU and moderate values of eccentricity (up to 0.3) and inclination (up to 20°). (Web site)
3. For a perfectly circular orbit the eccentricity is zero; elliptical orbits have eccentricities between zero and one. (Web site)

### EccentricitiesUpDw('ECCENTRICITIES','-Abz-');

1. Owing to mutual gravitational perturbations, the eccentricities of the orbits of the planets in our solar system vary over time. (Web site)
2. The orbits of the planets are ellipses but the eccentricities are so small for most of the planets that they look circular at first glance. (Web site)
3. Since the eccentricities are small, we can assume that the orbits of the Earth around the Sun and the Moon around the Earth are both circles.

### Inner Solar SystemUpDw('INNER_SOLAR_SYSTEM','-Abz-');

1. Many comets have orbits that keep them in the inner solar system and allow their trajectories to be calculated with great accuracy and precision. (Web site)
2. The inner Solar System is also dusted with rogue asteroids, many of which cross the orbits of the inner planets. (Web site)
3. A comet that orbits mainly in the inner solar system. (Web site)

### Main Asteroid BeltUpDw('MAIN_ASTEROID_BELT','-Abz-');

1. Because of the long travel times to the main asteroid belt, the asteroids whose orbits bring them fairly close to Earth are being studied.
2. The vast majority of asteroids are found within the main asteroid belt, with elliptical orbits between those of Mars and Jupiter.

### VenusUpDw('VENUS','-Abz-');

1. The dashed circles show the orbits of Mercury, Venus, Earth and Mars to give the scale of the orbits.
2. Venus and Mercury are closer to sun than earth so do not wander far from sun in their orbits as seen on the sky.
3. The inclination of the orbits of Venus and Mercury to the Solar Equator, slightly more than 3 degrees, is less than that of the other planets. (Web site)

### Eccentric OrbitsUpDw('ECCENTRIC_ORBITS','-Abz-');

1. They have highly eccentric orbits, generally a perihelion within the orbits of the inner planets and an aphelion far beyond Pluto. (Web site)
2. Neptune, Venus, and Earth are the planets with the least eccentric orbits in our solar system. (Web site)
3. Pluto and Mercury are the planets with the most eccentric orbits in our solar system. (Web site)

### EllipticalUpDw('ELLIPTICAL','-Abz-');

1. Elliptical Orbits -- Although some objects follow circular orbits, most orbits are shaped more like "stretched out" circles or ovals.
2. Came up with the idea that planets move in elliptical orbits with the sun as one of the foci, and a planet sweeps out equal areas in equal times. (Web site)
3. Satellites in elliptical orbits move slower at apogee than at perigee.

### Hyperbolic OrbitsUpDw('HYPERBOLIC_ORBITS','-Abz-');

1. Eccentricity is strictly defined for all circular, elliptic, parabolic and hyperbolic orbits.
2. Single-apparition comets have parabolic and hyperbolic orbits which will cause them to permanently exit the solar system after one pass by the Sun. (Web site)
3. It works equally well on circular, elliptical, parabolic, and hyperbolic orbits; and also works well with perturbation theory. (Web site)

### Planetary MotionUpDw('PLANETARY_MOTION','-Abz-');

1. The basis for the modern understanding of orbits was first formulated by Johannes Kepler whose results are summarised in his three laws of planetary motion.
2. The findings were published in his First Law of Planetary Motion, and brought forward important laws related to orbits of celestial bodies.
3. Johannes Kepler Suggested the elliptical orbits of planets, and propounded his Laws of Planetary Motion.

### Johannes KeplerUpDw('JOHANNES_KEPLER','-Abz-');

1. In the 17th century, Johannes Kepler found that he could represent the orbits of the planets around the Sun by ellipses.
2. In the 17th century, Johannes Kepler explained that the orbits along which the planets travel around the Sun are ellipses, which is Kepler's first law.
3. Johannes Kepler managed to fix this problem in around 1620 by explaining that the orbits of the planets are not precisely circular, but are ellipses.

### Low Earth OrbitUpDw('LOW_EARTH_ORBIT','-Abz-');

1. There are essentially three types of Earth orbits: high Earth orbit, medium Earth orbit, and low Earth orbit.
2. The following orbits can be defined: Low Earth Orbit Satellites in low earth orbit (LEO) orbit the earth at altitudes of less than 2000 km (1242 miles). (Web site)
3. Modern communications satellites typically use geosynchronous orbit s, Molniya orbits or Low Earth orbit s.

### Low Earth OrbitsUpDw('LOW_EARTH_ORBITS','-Abz-');

1. Orbits whose maximum altitudes are less than approximately 2000 km are generally considered low Earth orbits.
2. Low Earth Orbits (LEO): LEOs are either elliptical or (more usual) circular orbits at a height of less than 2,000 km above the surface of the earth. (Web site)
3. Modern communications satellites use geostationary orbits, Molniya orbits or low Earth orbits.

### Giant PlanetsUpDw('GIANT_PLANETS','-Abz-');

1. Centaurs orbit the Sun between Jupiter and Neptune, crossing the orbits of the large gas giant planets.
2. Since their elliptical orbits frequently take them close to the giant planets, comets are subject to further gravitational perturbations. (Web site)
3. Gravitational perturbations from giant planets cause their orbits to change. (Web site)

### Asteroid BeltUpDw('ASTEROID_BELT','-Abz-');

1. This colorful Chinese stamp approximates our current view of the solar system, even showing the asteroid belt between the orbits of Mars and Jupiter.
2. The asteroid belt has gaps, known as Kirkwood gaps, where these resonances occur as the asteroids in these resonances have been moved onto other orbits. (Web site)
3. The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. (Web site)

### Polar OrbitUpDw('POLAR_ORBIT','-Abz-');

1. Most polar orbits are in LEO, but any altitude can be used for a polar orbit. (Web site)
2. Polar Orbit An object which orbits around the poles.
3. Orbits with a high inclination angle are usually called polar orbit s.

### Polar OrbitsUpDw('POLAR_ORBITS','-Abz-');

1. Those orbits above the equator are generally called equatorial obits, whilst those above the poles are called polar orbits. (Web site)
2. Polar orbits (PO) are orbits with an inclination of 90 degrees. (Web site)
3. Polar Orbits enable satellites to scan the entire surface of the Earth.

### KeplerUpDw('KEPLER','-Abz-');

1. Kepler believed that this could be used to determine the orbits of planets in the solar system.
2. Newton showed that the laws derived by Kepler were in accord with his theory and indicated that the planets move in elliptical orbits about the Sun. (Web site)
3. Besides coming up with the Three Laws, Kepler theorized that the five regular solids represented the orbits of the known planets.

### Planetary OrbitsUpDw('PLANETARY_ORBITS','-Abz-');

1. Kepler was the first to search for a physical explanation for planetary orbits and he discovered that the orbits are elliptical with the sun at one focus. (Web site)
2. The laws of planetary orbits also apply to the orbits of comets, natural satellites, artificial satellites, and space probes. (Web site)
3. As to why planetary orbits are elliptical and not circular, chalk it up to small variations in the dust cloud the solar system formed from. (Web site)

### Geosynchronous OrbitUpDw('GEOSYNCHRONOUS_ORBIT','-Abz-');

1. The orbits of the satellites are known as the geosynchronous orbit and geostationary orbit. (Web site)
2. Medium Earth Orbit (MEO) - Geocentric orbits ranging in altitude from 2000 km - to just below geosynchronous orbit at 35,786 km (22,240 miles).
3. Some common objects in these elliptical orbits are rocket bodies used to boost payloads from low Earth orbit to geosynchronous orbit.

### CategoriesUpDw('Categories','-Abz-');

1. Science > Astronomy > Universe > Planets
2. Encyclopedia of Keywords > Places > Earth
3. Universe > Space > Spacecraft > Satellites
4. Astronomy > Universe > Planets > Jupiter
5. Orbit

### SubcategoriesUpDw('Subcategories','-Abz-');

 Circular Orbit (1) Hohmann Transfer Orbit (2)

### Related Keywords

* Accuracy * Bodies * Circular Orbits * Close * Comet * Comets * Earth * Earth Orbits * Electron * Electrons * Ellipse * Ellipses * Elliptical Orbit * Elliptical Orbits * Equator * Geostationary Orbits * Geosynchronous Orbits * Jupiter * Lie * Mars * Mercury * Mercury Orbits * Moon * Motion * Orbit * Orbiting * Orbits Earth * Orbits Jupiter * Orbits Lie * Period * Periods * Plane * Planet * Planets * Planets Orbits * Satellite * Satellites * Solar System * Solar System Orbits * Space * Spacecraft * Sun * Sun Orbits * Time
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 Short phrases about "Orbits"   Originally created: August 01, 2010.   Links checked: June 02, 2013.   Please send us comments and questions by this Online Form   Please click on to move good phrases up.
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