Sentences with phrase «dwarf star called»

Consider, for instance, the red dwarf star called TRAPPIST - 1, just under 40 light - years away.

Not exact matches

The supernova, known as SN1987A, was first seen by observers in the Southern Hemisphere in 1987 when a giant star suddenly exploded at the edge of a nearby dwarf galaxy called the Large Magellanic Cloud.

• How might the burned - out stars called white dwarfs be brought to ruin by other stars in so - called Type Ia supernovae, inciting the fiery alchemy that yielded much of the iron in our blood and the potassium in our brains?

Researchers from the Niels Bohr Institute, among others, have detected a stream of stars in one of the Andromeda Galaxy's outer satellite galaxies, a dwarf galaxy called Andromeda II.

For that reason, Hyman's team has not ruled out a lower - energy source, such as magnetic outbursts from a dim «failed star» called a brown dwarf.

Boss has recently proposed a similar effect to explain the discovery of two gas giants and two so - called super-Earths, or big rocky planets, each orbiting a small red dwarf star.

Compared with slightly warmer stars called K dwarfs and with suns like ours, M dwarfs probably have the lead on habitable worlds.

The leading suspects have long been dim, cold, half - solar - mass stars called white dwarfs.

CANNIBAL ZOMBIE STAR Dead stars called white dwarfs (left) steal material from ordinary companion stars (right), as shown in this artist's illustration.

The researchers also saw the star, which they named Nova Scorpii AD 1437, give smaller outbursts called dwarf novas in the 1930s and 1940s.

The event was what's known as a classical nova explosion, which occurs when a dense stellar corpse called a white dwarf steals enough material from an ordinary companion star for its gas to spontaneously ignite.

In May, Drake Deming of NASA was collecting data he hoped might reveal a super-Earth in the habitable zone of a red dwarf (a small and relatively cool star) called Gliese 436; NASA had allowed him to use a spacecraft called Epoxi, which is on its way to a rendezvous with a comet, to observe several stars that are already known to have planets.

Early in its mission, Kepler managed to find some tantalizing worlds, a handful of supersize cousins of Earth, most of them in clement orbits around smaller, cooler, quieter stars than the sun called M and K dwarfs, but all the setbacks made finding smaller Earth - sized planets around sun - like G stars a very tall order.

Some MACHOs may be neutron stars left behind after supernovae explosions, but most are thought to be tiny failed stars called brown dwarfs which have a mass of less than 8 per cent that of the Sun and are too small to sustain nuclear fusion reactions.

All type 1a evolve from a type of star called a white dwarf, but pinning down exactly which white dwarfs are supernova precursors could lead to much more precise measurements of dark energy — and even reveal its true nature.

Another, less common kind of supernova, type 1a, occurs when a remnant of a star called a white dwarf steals matter from a companion star until the white dwarf explodes (SN: 4/30/16, p. 20).

Brown dwarfs are objects that are too large to be called planets, yet too small to be stars.

Ultra-compact dwarfs, highlighted here within the so - called Fornax galaxy cluster, are a type of small star system.

Brown - dwarf buddies: Astronomers still can't agree on what to call brown dwarfs: Are they failed stars, without enough mass to kick - start the nuclear reactions of typical stars, or are they supersize planets?

Gas - giant planets more massive than Jupiter — as well as «failed stars» called brown dwarfs — should conversely have much shallower winds.

These so - called supersoft sources are now thought to be white dwarf stars that cannibalize their stellar companions and then, in many cases, explode

Brown dwarfs are sometimes called failed stars.

Neither study searched for the stars responsible for so - called type Ia supernovae, which are explosions of white dwarf stars that have grown overweight by feasting on material from a companion star.

Observations of the explosions of white dwarf stars in binary systems, so - called Type Ia supernovae, in the 1990s then led scientists to the conclusion that a third component, dark energy, made up 68 % of the cosmos, and is responsible for driving an acceleration in the expansion of the universe.

Even protostars — these are young stars that are just forming and making their own planetary disks and so on — they make very powerful outflows called, the same sort of jets obviously moving at slower speeds, but they are full of plasma, that is flowing out at high speed; white dwarfs, neutron stars, black holes big and small, they seem able to do this task, it really seems to be a very common phenomenon.

To explain the MOA results, some theorists guessed that many of the purported rogue giant planets were actually free - floating failed stars called brown dwarfs — intermediate objects that straddle the hazy line between being a planet and a sun.

The star is a red dwarf just 4.3 light years away from us with a planet called Proxima Centauri b orbiting in the habitable zone.

Those remnants, which McConnachie calls «the partially digested remains of these dwarf galaxies,» take the form of large, diffuse streams of stars, former galactic groupings that have been pulled apart by the larger galaxy's gravitational pull.

The first so - called helium nova, the possible result of a large white dwarf sucking material from a hydrogen - deficient companion star, may be a precursor to a supernova

Specifically, the most energetic iron emission they studied is characteristic of so - called x-ray binary starsduos comprised of a dense stellar object such as a white dwarf star, a neutron star or a black hole that collects matter from a less dense companion, emitting x-rays in the process.

The dwarf galaxy also is of interest because it provides clues to how the early simple universe became re-ionized by early star formation, moving it from the so - called cosmic Dark Ages of neutral gases to the development of the complexly structured universe now in existence, where the gas between galaxies is ionized.

Other astronomers find the detections convincing, although most reserve the name «planet» for bodies that form within a planetary system and orbit stars, says theorist Alan Boss of the Carnegie Institution of Washington in Washington, D.C. «They should call them «planetary - mass brown dwarfs,»» Boss says.

The burned - out star, called a white dwarf, appears as a white dot in the center.

Take the most common type of star in the Milky Way - so - called red dwarf stars that are cooler, smaller and longer - lived than stars like the sun.

The ordinary hydrogen - burning dwarf stars like the Sun are found in a band running from top - left to bottom - right called the Main Sequence.

[12] These main - sequence (and therefore «normal») stars are called dwarf stars.

However, most stars in the galaxy, around 75 %, are lower mass stars called red dwarfs, or M stars (See Figure 1).

When the fires of fusion stop burning in the heart of a star, the core may collapse into a highly dense object called a white dwarf.

Such a star may become a white dwarf or a neutron star, but if the star is sufficiently massive then it may continue shrinking eventually to the size of a tiny atom: this is the so - called «gravitational singularity».

To distinguish these groups, he called them «giant» and «dwarf» stars.

This process, the astronomers explain, could provide an explanation for the very - low - mass «failed stars» called brown dwarfs.

The image also suggests that low mass brown dwarfs — objects that have the awkward distinction of being too large to be called planets and too small to be categorized as stars — may be more common than observations so far suggest.

The new study describes a dead star, or white dwarf, called PG 0010 +280.

The star, called Gliese 1132, is an M dwarf (commonly known as a red dwarf).

Perhaps the infrared light is coming from a companion small «failed» star, called a brown dwarf — or more intriguingly, from a rejuvenated planet.

As stars like our sun age, they puff up into red giants and then gradually lose about half or more of their mass, shrinking into skeletons of stars, called white dwarfs.

But contained within these dead stars, called white dwarfs, is the early history of our galaxy, providing clues on how it came to be.

Scientists from a large international collaboration (Oxford, AWE, CEA, LULI, Observatoire de Paris, University of Michigan and University of York) have succeeded for the first time to generate a laboratory analogue of a strong shock that takes place when matter falls at very high speed on the surface of extremely dense stars called white dwarfs.

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).

They are so called because one of the pair of stellar companions is a normal star and the other a compact object — a white dwarf, neutron star, or possibly a black hole.