Sentences with phrase «distance around the star»

The habitable zone is the distance around any star that is neither too hot nor too cold for liquid water to exist on a planet's surface.

Not exact matches

The observation provides the first evidence for black holes that does not depend on watching hot gas or stars swirl around them at far greater distances.

According to the researchers» calculations, such a hypothetical planet would complete one orbit around the Sun roughly every 17,000 years and, at its farthest point from our central star, it would swing out more than 660 astronomical units, with one AU being the average distance between Earth and the Sun.

These orbits put the planets at safe distances from their chaotic parent stars, which are pulling each other around in a constant cosmic waltz.

One of the earliest and most astounding systems found by direct imaging is the one around the star HR 8799, where four planets range in orbits from beyond that of Saturn out to more than twice the distance of Neptune.

Thus, as the scientists will announce in a future issue of The Astronomical Journal, the dim red sun probably revolves around the bright white star, even though the two are separated by a whopping 2.5 light - years of space, which is more than half the distance between the sun and Alpha Centauri, the nearest star system to our own.

In fact, last week, astronomers found a rocky planet not much bigger than Earth whose orbit around its relatively young star is only 3 % of the distance from Earth to the sun (ScienceNOW, 21 April).

«To be able to directly image planetary birth environments around other stars at orbital distances comparable to the solar system is a major advancement,» said Dr Nikku Madhusudhan of Cambridge's Institute of Astronomy, one of the paper's co-authors.

The new images home in on a region around the black hole less than 4.2 light - years across — smaller than the distance between the sun and its nearest star, says Roopesh

Although the increased size of the E-ELT will be essential to obtaining an image of a planet at larger distances in the Milky Way, the light collecting power of the VLT is just sufficient to image a planet around the nearest star, Alpha Centauri.

The two binary stars A and B revolve around their common centre of mass in a relatively close orbit, while the third star, Proxima Centauri, is 0.22 light years away, more than 12,500 times the distance between the Sun and Earth.

(Fomalhaut b, by contrast, orbits at nearly twice the distance of the farthest - flung planet around HR 8799, albeit around a larger star.)

The newly announced one, MOA -2009-BLG-266Lb, is estimated to be just over 10 times the mass of Earth and orbits at a distance of 3.2 AU around its parent star with roughly half the mass of the sun.

According to the Sixth Catalog of Orbits of Visual Binaries, Stars A and B move around each other at an average distance of 7.33 AUs (semi-major axis a = 0.58») in a very eccentric (e = 0.43) orbit that takes 19.5 years to complete.

Giant stars Aa and Ab are separated by less than the Earth - Sun orbital distance (around 0.73 AU).

At that distance from the star, such a planet would have an orbital period of about 124 days, or around a third of an Earth year.

In the lower part of the figure are plotted our Solar System planets as they would appear in reflected light around a Sun - like star at a distance of 10 pc.

An Earth - type planet could have liquid water in a stable orbit centered around 0.036 AU from Star B — well within the orbital distance of Mercury in the Solar System.

A year on Ross 128 b is slightly less than 10 days, so the distance at which it whips around the star is very close.

The failure, thus far, to find large substellar objects like brown dwarfs or a Jupiter - or Saturn - class planet in a «torch» orbit (closer han the Mercury to Sun distance) around 107 Piscium — with even the highly sensitive radial - velocity technique of Geoffrey W. Marcy and R. Paul Butler — bodes well for the possibility of Earth - type terrestrial planets around this star (Cumming et al, 1999).

At that distance from the star, such a planet would have an orbital period of around 4.7 Earth years.

An Earth - type planet could have liquid water in a stable orbit centered around 1.18 AU from Star A — between the orbital distances of Earth and Mars in the Solar System.

The orbit of an Earth - like planet (with liquid water) around close - orbiting Stars A and B may be centered as close as 1.06 AU — between the orbital distances of Earth and Mars in the Solar System — with an orbital period of over 384 days (1.05 years).

At their closest approach, Stars A and B are about two AUs farther apart than the average orbital distance of Saturn around the Sun, while their widest separation is still about six AUs farther the average orbital distance of Neptune.

According to the Sixth Catalog of Orbits of Visual Binaries, Stars A and B move around each other at an average distance of 250 AUs (semi-major axis a = 22.289») in a mildly eccentric (e = 0.13) orbit that takes 2,720 years to complete.

Calculations by to Weigert and Holman (1997) indicated that the distance from the star where an Earth - type planet would be «comfortable» with liquid water is centered around 0.73 to 0.74 AU — somewhat beyond the orbital distance of Venus in the Solar System — with an orbital period under an Earth year using calculations based on Hart (1979).

A planet with at least 5.7 Earth - masses has been found in orbit around Star C of triple - star system MLO 4 at an orbital distance of only 0.05 AUs (more info and vidStar C of triple - star system MLO 4 at an orbital distance of only 0.05 AUs (more info and vidstar system MLO 4 at an orbital distance of only 0.05 AUs (more info and video).

Calculations by to Weigert and Holman (1997) indicated that the distance from the star where an Earth - type planet would be «comfortable» with liquid water is centered around 1.25 AUs (1.2 to 1.3 AUs)-- about midway between the orbits of the Earth and Mars in the Solar System — with an orbital period of 1.34 years using calculations based on Hart (1979).

The beautiful bright blue stars of NGC 206 betray its youth - but close, systematic studies of variable stars in and around NGC 206 will also accurately reveal its distance.

Their simulations suggest that at least one planet in the one to two Earth - mass range could have formed within orbital distances of 0.5 to 1.5 AUs around both heavy - element - rich stars; of particularly note, the simulations frequently generated a Earth - like planet in or near Star B's habitable zone (where liquid water could exist on the planet's surface).

Hubble's «eye» is so sharp that it was able to pick out the fuzzy globular clusters, which, at that distance, look like individual stars bunched up around the galaxies, instead of groupings of stars.

However, owing to the relatively large orbital distances of the currently known NIR stars around Sgr ~ A *, there have been no dynamical measurements of its spin magnitude or orientation.

The most tantalizing of these sits at roughly the same distance from the central star as Earth orbits around the sun.

At distance, such a planet would probably be tidally locked — with one side in perpetual day — and possibly race around the star in less than 10 days.

Using the technique, which requires observing targets from opposite sides of Earth's orbit around the sun, astronomers have pinpointed the distance to the famed «Seven Sisters» star cluster, the Pleiades.

The orbit of an Earth - like planet (with liquid water) around this star would be centered around 1.14 AU — somewhat outside the orbital distance of Earth in the Solar System — with an orbital period of about one and a quarter of an Earth year.

By combining observational data from OGLE and Hubble, astronomers have been able to work out the nature of the star system, which is located around 8,000 light - years away, to great precision The star system consists of two red dwarfs orbiting one another only 7 million miles apart (as a comparison, this is only 14 times the Earth - moon distance).

As relatively small planets at close distances to their host stars, astronomers would have great difficulty in detecting such planets around either star using present methods.

Moving outwards from host star, planet «c» has 72 percent of Jupiter's mass and an orbital period of 2.8 years (1,024 days) with an average orbital distance of 1.76 AUs and eccentricity around 0.28.

The distance from Star A where an Earth - type planet would be «comfortable» with liquid water is centered around only 0.56 AU — between the orbital distances of Mercury and Venus in the Solar System.

Assuming that the spectroscopic companion B does not preclude a stable inner planetary orbit, the distance from Star A where an Earth - type planet would be «comfortable» with liquid water is centered around only 0.457 AU — between the orbital distances of Mercury and Venus in the Solar System.

This star is located about 224 AUs away on average (a semi-major axis of 14.39» at a HIPPARCOS distance of 50.87 light - years) with an orbital period around 2,000 years and an extremely high orbital eccentricity of 0.91.

It moves around Star A at an average distance of less than 0.05 AUs (a semi-major axis well within Mercury's orbital distance) in a near circular orbit (e = 0.23 + / - 0.015) that takes 3.312 days to complete.

According to the Ninth Catalogue of Spectroscopic Binary Orbits (for HD 210027), Stars A and B move around each other at an average distance of only 0.051 AUs (semi-major axis a = 0.00407 + / - 0.27») in a highly circular (e ~ 0) orbit that takes just 10.2 days to complete.

Given this distance, it takes approximately 80,000 Earth years for GU Psc b to make a complete orbit around its star.

The analyses did not resolve whether the perturbing body orbits Sirius A or B, although dynamical simulations suggest that stable orbits exist around both stars at circumstellar distances up to more than half the binary system's closest separation of 8.1 AUs (Daniel Benest, 1989).

It moves around Star A at an average distance of 0.35 AUs (a semi-major axis inside the orbital distance of Mercury) in an elliptical orbit (e = 0.21) that takes about 75.6 days to complete.

The stars of Alpha Centauri lie 4.3 light - years from us, which is around 270,000 times the distance from the Earth to the sun.

HD 147513 A is a so - called young «Barium dwarf» (s - process element rich but comparatively carbon deficient) star that was probably enriched by an asymptotic branch giant (AGB) star (see Gacrux) but is now a very dim, white dwarf companion, which has an observed separation of around 4,400 AUs — 5.7» at a HIPPARCOS distance estimate of 42.0 ly (Porto de Mello and da Silva, 1997; and Poveda et al, 1993, pp. 74 - 75).

The orbit of an Earth - like planet (with liquid water) around Star A may be centered as close as 1.8 AU — between the orbital distances of Mars and the Main Asteroid Belt in the Solar System — with an orbital period of 2.2 years.