Sentences with phrase «old star clusters»

Because it is above the atmosphere, the Hubble Space Telescope can detect these small dead stars in nearby old star clusters called globular clusters.

«No single model for the formation of these star clusters can currently reproduce the diversity of structural properties we have observed for old star clusters,» Professor Forbes said.

47 Tucanae is a 12 - billion - year - old star cluster located 13,000 light - years from Earth in the southern constellation of Tucana the Toucan.

According to the researchers, this particular IMBH is located in the center of a 12 billion - year - old star cluster named 47 Tucanae, where its gravity is affecting the motion of stars.

Cosmically speaking, the the 500,000 - year - old star cluster is extremely young.

The stars which are even older have dissipated into a more diffuse background; this includes intermediate population I stars, older star clusters and the younger representatives of the planetary nebulae.

Not exact matches

Star clusters are made up of giant circular clouds of old stars, some around 12 billion years old (the universe itself is 14.8 billion years old), that clump together due to gravity, and are found circling cores of galaxies.

Yet recent discoveries of young stars in old globular clusters have scrambled this tidy picture.

When the cosmos was a few hundred million years old, this gas coalesced into the earliest stars, which formed in clusters that clumped together into galaxies, the oldest of which appears 400 million years after the universe was born.

While globular clusters are billions of years old, the planetary nebula phase of a star's life only lasts for a few thousand years, so it's exceedingly rare to find them in globulars.

This image clearly shows stars nearly all the way into the core, and you can see that many of the stars are red, indicating their great age: The cluster is over 10 billion years old.

Population II stars are older, with a low heavy - element content, and are found in the Milky Way Bulge and Halo, and globular star clusters.

Conventional wisdom says that globular star clusters are the stodgy old codgers of the universe, but it turns out that many of these clusters are young

The group of bright blue - white stars at the upper - left is the Trapezium Cluster — made up of hot young stars that are only a few million years old.

At that time, the sun likely resembled Iota Horologii, because the star is young: it's thought to have escaped from the Hyades star cluster, which is just 600 million years old, or about one - eighth our sun's present age.

On the other hand globular clusters are much bigger spherical collections of much older stars that orbit around the centre of a galaxy.

These stars may even be the remains of the most massive and oldest surviving star cluster of the entire Milky Way.

The NASA / ESA Hubble Space Telescope has captured the best ever image of the globular cluster Messier 15, a gathering of very old stars that orbits the centre of the Milky Way.

Not only are these stars powerful evidence for an important theory of galactic evolution, they are also likely to be over 10 billion years old — the dim, but dogged survivors of perhaps the oldest and most massive star cluster within the Milky Way.

As RR Lyrae stars typically reside in ancient stellar populations over 10 billion years old, this discovery suggests that the bulging centre of the Milky Way likely grew through the merging of primordial star clusters.

As this cluster is relatively old, a part of this lost mass will be due to the most massive stars in the cluster having already reached the ends of their lives and exploded as supernovae.

RR Lyrae stars allow exact distance estimations and are found only in stellar populations more than 10 billion years old, for example, in ancient halo globular clusters.

Although in the case of NGC 2477 astronomers seem to have underestimated the age of the cluster; they may have overestimated the age of other clusters, and this may explain the conflict between the ages of the oldest stars and the latest estimate of the Universe's age.

Stars in the extremely old globular cluster NGC 6397 are slightly polluted by the shattered fusion products of an even earlier generation of sStars in the extremely old globular cluster NGC 6397 are slightly polluted by the shattered fusion products of an even earlier generation of starsstars.

He calculated that the oldest stars in the galactic center had to be at least one billion years older than the oldest stars in globular clusters to allow enough time for so many RR Lyraes to evolve there.

Some stars in globular clusters may be 15 billion years old, he says, but the great bulge at the center of the Milky Way — a younger part of the galaxy, according to conventional wisdom — actually holds stars that are 1 or 2 billion years older.

Because globular clusters are the oldest known structures in the universe, the beryllium must have been produced by the long - sought first generation of stars.

Ask most astronomers where to find the oldest stars in the galaxy and they'll tell you to look at globular clusters, dense knots of stars that hover above and below the plane of the Milky Way.

Lee doesn't dispute that globular cluster stars are old — only that they are the oldest.

By that logic, globular clusters — swarms of metal - poor stars as old as our galaxy — are the last place one would expect to find planets.

The cluster contains thousands of stars less than 2.5 million years old, making it the best place to find the biggest young stars that have not yet exploded.

Formed a billion years after the Big Bang, the universe's oldest and most distant known planet circles a collapsed star, or pulsar (green circle), in the globular cluster M4, which is 5,000 light - years away from Earth.

Globular clusters are spherical clumps of hundreds of thousands of old, low - mass stars, held together by the mutual pull of their gravity.

In a new study, the scientists show their theoretical predictions last year were correct: The historic merger of two massive black holes detected Sept. 14, 2015, could easily have been formed through dynamic interactions in the star - dense core of an old globular cluster.

Now, scientists have shown that there's some truth to the age - old advice: A dimming of the Pleiades star cluster may actually auger a weather change that affects local farmers, according to a report in today's Nature.

If this result is confirmed, it means that our Galaxy may have looked different in the past with more globular clusters — tightly packed conglomerations of hundreds of thousands of old stars — than the 150 to 200 that it has today.

But the star cluster has to be very dense and very young — about 10 million years old — to allow this to happen, say the researchers.

The team suggests that they are rather evolved, old members of the cluster consuming the last of their gas to form stars.

Brighter stars also live shorter lives, and since globular clusters are old, those stars have died out.

The cluster is more than 12 billion years old, which means the stars that the researchers looked at formed only a few hundred million years after the death of first - generation stars.

Globular clusters, which are found in the halo of a galaxy, contain considerably more stars and are much older than the less dense galactic, or open clusters, which are found in the disk.

The Milky Way's dense globular clusters are spherical swarms of red, lightweight and ancient stars, most of them more than 10 billion years old.

This would be fine, were it not for the fact that studies of globular clusters of stars suggests they are about 15 billion years old.

STScI / NASA press releases: Hubble Makes the First Precise Distance Measurement to an Ancient Globular Star Cluster Hubble Unmasks Ghost Galaxies Deepest View of Space Yields Young Stars in Andromeda Halo Hubble Identifies Source of Ultraviolet Light in an Old Galaxy ESA press releases: Hubble Unmasks Ghost Galaxies Four Unusual Views of the Andromeda Galaxy Public speaking: On the Trail of the Missing Galaxies High - Level Science Products from Large and Treasury Programs: GO - 9453: The Age of the Andromeda Halo (126 orbits) GO - 10265: The Formation History of Andromeda (107 orbits) GO - 10816: The Formation History of Andromeda's Extended Metal - Poor Halo (128 orbits) GO - 11664 / 12666: The WFC3 Galactic Bulge Treasury Program: Populations, Formation History and Planets (56 orbits) GO - 12549: The Formation History of the Ultra-Faint Dwarf Galaxies (113 orbits)

«Old, compact star clusters, such as globular clusters, are well known to amateur astronomers,» Professor Forbes said.

The group of bright blue - white stars at the left is the Trapezium Cluster, hot young stars that are only a few million years old.

NGC 6997 is definitely a star cluster, but it is rather old and it probably did not form in the nebula.

Gillian Wilson, professor of physics and astronomy at UC Riverside, added, «Fascinatingly, however, the study found that the percentage of galaxies which had stopped forming stars in those young, distant clusters, was much lower than the percentage found in much older, nearby clusters.

Others, known as globular clusters, are among the oldest objects in the Universe and contain up to a million ancient stars.

This scenario is supported by the age estimations of the stars in the inner halo (10 — 12 billion years old) and globular clusters.