| Nevertheless, this unique observing technique opens a new phase in the exploration of exoplanets, or extrasolar planets, say astronomers. |
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| To date there have been no successful detections of extrasolar planets with the astrometric method. |
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| However, independent information comes from extrasolar planet host metallicities, the supernova rate and the metallicity evolution of the Galaxy. |
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| This makes it the most distant extrasolar planet detected by astronomers to date. |
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| Both extrasolar planets and brown dwarfs give off most of their energy in the infrared region of the spectrum. |
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| Based on extrasolar planet discoveries in our own stellar neighborhood, astronomers predicted that seventeen planets should have been discovered. |
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| The creation interpretation affects our understanding of the origin of our solar system and of extrasolar planets. |
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| Now we're looking for extrasolar planets, space still has the capacity to make me excited. |
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| Then, the extrasolar planets orbit much closer to their host stars and have a greater orbital eccentricity than the planets in our solar system. |
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| A planetary scientist at the California Institute of Technology has discovered the first extrasolar planet under three suns in the constellation Cygnus. |
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| By the early twenty-first century, extrasolar planets have been found orbiting almost seventy solar-mass stars in the nearby region of the galaxy. |
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| The first well-established example of an extrasolar planetary system was reported during the year. |
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| This system is probably the most populated extrasolar planetary system known to date. |
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| However, extrasolar planets which have been discovered so far are mostly gas giants. |
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| So, in comparison with planets in the Solar System, extrasolar planets have very different orbital properties. |
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| Some even contain extrasolar mineral grains and primordial compounds made in other stars, yielding information about the origin of the Universe. |
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| Unlike these extrasolar planets, gas giants in our Solar System are located far from the sun. |
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| The CoRoT satellite has two missions: the search for extrasolar planets by transit and the detection of the stellar oscillations. |
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| In other words, the planets of our Solar System have something different from extrasolar planets. |
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| Work under this Chair involves developing specialized high-tech, astronomical instrumentation for the direct imaging of extrasolar planets. |
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| The polarimeter will mainly be used to measure the polarisation of radiation emitted by the coldest objects in the universe, such as forming stars or extrasolar planets. |
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| Astronomers have found most extrasolar planets orbiting younger, relatively metal-rich stars. |
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| Gliese 581, extrasolar planetary system containing four planets. |
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| Today the tally of known planets stands at nearly 900, thanks to the development in the past 20 years of techniques to detect planets around other stars, known as extrasolar planets, or exoplanets. |
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| And its resolving power will help with the search for extrasolar planets. But all that is a long way off, and the telescope will have to be built first. |
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| No one knows if most extrasolar planets are gas giants or small, rocky planets. |
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| For a few days now, we have been working on the transit of an extrasolar planet, which will take place the day after tomorrow,' states René Rutten enthusiastically. |
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| A hot Jupiter is a massive extrasolar planet that orbits very close to its parent star. |
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| The oldest observations dates from April 17, 1991, i.e. 4 years before the discovery of the first extrasolar planet and more than 8 years before the discovery of the HD 209458 planet transit by Charbonneau and Henry. |
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| In addition, these extrasolar planets are located closer to their stars. |
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| During the 1990s, the measurement of the stellar wobble of nearby stars was used to detect large extrasolar planets orbiting those stars. |
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| Figure 1: Diagram indicating the stability against tidal effects, of the extrasolar planetary systems accomodating a planet detected by the method of transit. |
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| An extrasolar planet or exoplanet is any planet outside our solar system. |
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| The new object, whose existence was announced on January 10th at a meeting of the American Astronomical Society, in Seattle, is causing excitement because it is the smallest extrasolar planet yet discovered. |
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| But existing plans to photograph extrasolar planets in this way involve orbiting arrays of reflecting telescopes all pointing in exactly the same direction. |
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| A four-inch telescope was once used to find an extrasolar planet. |
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| Planetary science is the study of the assemblage of planets, moons, dwarf planets, comets, asteroids, and other bodies orbiting the Sun, as well as extrasolar planets. |
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| Extrasolar terrestrial planets that are extremely close to their parent star will be tidally locked and so one half of the planet will be a magma ocean. |
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