Sentences with phrase «dwarf star about»

The reason, of course, was the news this week that other planet hunters had identified a planet, Gliese 581g, with attributes suitable for harboring life (as we know it) orbiting a red dwarf star about 20 light years from Earth.

It orbits a red dwarf star about 200 light years away, which is called K2 - 155.

Dubbed a «waterworld» and located a mere 42 light - years from Earth, GJ 1214b orbits near a red dwarf star about one - fifth the size of our sun.

Not exact matches

Brain and his colleagues started to think about applying these insights to a hypothetical Mars - like planet in orbit around some type of M - star, or red dwarf, the most common class of stars in our galaxy.

The white dwarf star is located about 570 light - years from Earth in the constellation Virgo.

Close encounter Tracing the trajectory of the star and its brown dwarf companion back in time, Mamajek's team found with 98 % confidence that Scholz's star passed within the Solar System's Oort cloud, a reservoir of comets, about 70,000 years ago.

These failed stars, or brown dwarfs, inhabit a peculiar gray area between large planets and small stars, and their split personalities are providing scientists with new ways to learn about both kinds of objects.

Astronomers have a lot to learn about white dwarfs, starting with the stars» plasma exterior, since that is the only part directly visible through a telescope.

M dwarfs make up about 70 percent of the several hundred billion stars in the galaxy.

The faintest of the new dwarf galaxy candidates has about 500 stars.

Imagine being able to view microscopic aspects of a classical nova, a massive stellar explosion on the surface of a white dwarf star (about as big as Earth), in a laboratory rather than from afar via a telescope.

About 561 light - years away, the fifth planet discovered in this dwarf - star system circles its star's habitable zone.

Scientists are looking closer at brown dwarfs to learn more about the formation of stars and planets.

Despite being discovered 20 years ago, very little is known about brown dwarfs — notably why they fail to grow into stars.

The white dwarf, a cooling star thought to be in the final stage of life, is about Earth's size but 200,000 times more massive.

Using data gathered by an infrared camera during a survey of such stars, astronomers have found that the brightness of a brown dwarf — dubbed 2MASS 2139, which lies about 47 light - years from Earth — varied as much as 30 % in less than 8 hours.

But von Hippel, Gilmore and their colleagues used the Hubble Space Telescope, and this allowed them to identify and measure the temperature of white dwarfs as faint as 25th magnitude, which is about 100 million times fainter than any star visible with the naked eye.

Researchers led by space physicist Chuanfei Dong of the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) and Princeton University have recently raised doubts about water on — and thus potential habitability of — frequently cited exoplanets that orbit red dwarfs, the most common stars in the Milky Way.

It orbits a dim, red dwarf star (shown at left) about 200 light - years from Earth.

SS: TESS will do an all - sky survey to find rocky worlds around the bright, closest M - stars [red dwarfs that are common and smaller than the sun — and therefore more likely to reveal the shadows cast by planets], about 500,000 stars.

When Sigurdsson and colleagues analyzed images of the white dwarf from the Hubble Space Telescope, they concluded that the distant, unseen companion is not a low - mass star, as many researchers had thought, but a planet with about 2.5 times the mass of Jupiter.

The first hint of the kamikaze asteroids came about 40 years ago, when astronomers discovered heavy elements such as magnesium in the spectra of some white dwarf stars.

But astronomers have always wondered about the paucity of close - in brown dwarfs: While many giant planets have been found in small orbits, whirling around their sunlike stars in just a few days, the more massive brown dwarfs appear to shun these intimate relationships.

Dwarf galaxies, amorphous blobs of only tens of millions of stars, were cranking out nearly a third of the new stars in the universe from about 8 billion to 10 billion years ago, according to new research posted June 17 on arXiv.org.

TRAPPIST - 1 is an ultra-cool red dwarf star that is slightly larger, but much more massive, than the planet Jupiter, located about 40 light - years from the Sun in the constellation Aquarius.

After all, we are talking about all the stars as well as planets, comets, moons, the Crab nebula, black holes, brown dwarfs, the Pacific Ocean, you, me, cans of soup, and the family dog — all of it.

The new survey will pick targets from a list of about 70,000 red dwarfs compiled by Andrew West at Boston University, and will listen to the stars in radio frequency bands between 1 and 10 gigahertz.

Both planets orbit K2 - 18, a red - dwarf star located about 111 light years away in the constellation Leo.

Then about 2 billion to 3 billion years ago, it and its star migrated toward the crowded center of the cluster and encountered a neutron star paired with a white dwarf.

The explosion was a Type Ia supernova, the most luminous variety, which occurred when a small, dense star known as a white dwarf blew up about 7000 light - years from Earth.

In spite of the fact that the dwarfs contain very different amounts of stars — ranging from a few thousand to more than 10 million — the total masses in the central regions were all equivalent to about 10 million suns, the team reports tomorrow in Nature.

The spacecraft's telescopes are sensitive to radiation from the hot outer atmospheres of stars like the Sun and white dwarfs, formed when stars about the size of the Sun reach the end of their lives.

The object, dubbed SDSS1133, lies about 2600 light - years from the center of a dwarf galaxy known as Markarian 177 (both of which lie within the bowl of the Big Dipper, a familiar star pattern in the constellation Ursa Major).

To make matters worse, the magnified object is a starbursting dwarf galaxy: a comparatively light galaxy (it has only about 100 million solar masses in the form of stars [3]-RRB-, but extremely young (about 10 - 40 million years old) and producing new stars at an enormous rate.

«As we learn more about them, it could improve our knowledge about the star formation process and possibly also refine our understanding of the distribution of matter in the universe, since it seems that there are far more brown dwarfs than initially thought.»

Astronomers thought white dwarfs gained mass from a companion star, but about half of the type Ia supernovae show no signs of a companion.

The single star closest to the sun is Barnard's star, a rather dim red dwarf about six light - years away.

Scholz's star is actually a binary system formed by a small red dwarf, with about 9 % of the mass of the Sun, around which a much less bright and smaller brown dwarf orbits.

The host star, Kepler - 186, is an M1 - type dwarf star relatively close to our solar system, at about 500 light years and is in the constellation of Cygnus.

The researchers found just as many brown dwarfs in RCW 38 — about half as many as there are stars — and realised that the environment where the stars form, whether stars are more or less massive, tightly packed or less crowded, has only a small effect on how brown dwarfs form.

The star also has a small companion, a red dwarf star that lies about 1000 times as far away as Earth's distance from the sun.

Other photographed objects have been too massive to be conclusively labeled planets, falling instead into the brown dwarf category (objects about eight to 80 Jupiters in size that lack sufficient mass to ignite hydrogen fusion in their cores, thereby never becoming true stars); have been found to themselves orbit brown dwarfs rather than stars; or have not been shown to be gravitationally bound to a star.

And from what we've learned about the rich diversity of the planets, dwarf planets and moons in our solar system, we shouldn't underestimate what we might discover in other star systems, says Soderblom.

The best estimates for the occurrence rates of habitable zone earth - sized planets around sun - like stars is about 50 %, and for lower - mass stars this value is likely to be even higher: most red dwarf stars are expected to have one or more habitable zone, approximately earth - sized planets.

At first blush, there is nothing particularly special about Kepler - 32, a dwarf star located about 910 light - years away in the constellation Cygnus.

This cool and dim, main sequence red dwarf (M1.5 Vne) may have about 37.5 to 48.6 percent of Sol's mass (Howard et al, 2014; RECONS; and Berger et al, 2006, Table 5, based on Delfosse et al, 2000), 34 to 39 percent of its diameter (Howard et al, 2014), and some 2.2 percent of its luminosity and 2.9 percent of its theoretical bolometric luminosity (Howard et al, 2014), correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 1980).

An extremely dim red dwarf, Star C is of spectral and luminosity type M7 V with only about 8.2 percent of Sol's mass, (Golimowski et al, 2000, in ps; and 1995).

However, a flare the size of a solar flare occurring on a red dwarf star (such as Groombridge 34 A or B) that is more than ten thousand times dimmer than our Sun would emit about as much or more light as the red dwarf itself, doubling its brightness or more.

A Type Ia supernova results from a white dwarf that's part of a binary system (that is, one that shares an orbit with another star) and was about twice the size of our sun during its life.

From the moment that seven Earth - sized planets were discovered in orbit around TRAPPIST - 1 — an ultracool dwarf star located 39 light years away — astronomers have been busy trying to learn everything they can about this intriguing star system, particularly its potential to foster life.