Stars News

Astronomers Use Gyrochronology to Reveal the Ages of 22 Sun-Like Stars

July 10, 2014

0 Comments

New Technique Measures the Age of a Star

Using a new technique for measuring the age of a star using its spin, astronomers reveal the gyrochronological ages of 22 Sun-like stars. Cambridge, Massachusetts – Defining what makes a star “Sun-like” is as difficult as defining what makes a planet “Earth-like.” A solar twin should have a temperature, mass, and spectral type similar to […]

Continue reading...

Hubble Views Stars’ Clockwork Motion in Nearby Galaxy

February 19, 2014

0 Comments

Hubble Views Stars Clockwork Motion

A team of astronomers used the Hubble Space Telescope measure the average motion of hundreds of individual stars over a seven-year period, revealing for the first time the rotation rate of a galaxy based on the clock-like movement of its stars. Using the sharp-eyed NASA Hubble Space Telescope, astronomers have for the first time precisely […]

Continue reading...

Astronomers Discover New Class of “Hypervelocity Stars”

January 10, 2014

4 Comments

Astronomers Discover a New Class of Stars

A newly published study details the discovery of a new class of “hypervelocity stars” – stars that are moving at speeds of more than a million miles per hour relative to the Milky Way and that are fast enough to escape gravitational grasp of the Milky Way. An international team of astronomers has discovered a […]

Continue reading...

Computer Simulations Show How Stars at the Center of the Milky Way Move

November 30, 2013

1 Comment

Study Reveals How Stars Move at the Center of the Galaxy

In a newly published study, researchers from the University of Rochester use computer simulations to show how the stars at the center of the Milky Way move in a peanut-shell shaped orbits. Two months ago astronomers created a new 3D map of stars at the center of our Galaxy (the Milky Way), showing more clearly […]

Continue reading...

New Survey Maps Where Stars Are Born

October 14, 2013

0 Comments

New Survey Maps Where Stars Are Born

Astronomers have completed the largest-ever survey of dense gas clouds in the Milky Way, cataloging and mapping more than 6,000 gas clouds and allowing astronomers to better understand the earliest phases of star formation. A team of astronomers led by Yancy Shirley at the University of Arizona’s Steward Observatory has completed the largest-ever survey of […]

Continue reading...

A Jet of Energetic Particles Reveals How Stars Begin Their Final Transformation

September 17, 2013

0 Comments

Magnetic Jet Reveals How Stars BeginTheir Final Transformation

A newly discovered jet of high-energy particles emanating from a dying star has helped scientists better understand how stars begin their final transformation. An international team of astronomers have for the first time found a jet of high-energy particles emanating from a dying star. The discovery, by a collaboration of scientists from Sweden, Germany and […]

Continue reading...

Hubble Views a Giant, Smoldering Star

September 16, 2013

0 Comments

New Hubble Image of Star HD 184738

This newly released Hubble image shows the star HD 184738. This new image, snapped by NASA/ESA Hubble Space Telescope, shows the star HD 184738, also known as Campbell’s hydrogen star. It is a Wolf-Rayet star — an evolutionary stage for stars with a mass of over 20 times that of our Sun, when they are […]

Continue reading...

Astronomers Identify the Oldest Solar Twin Known to Date

August 28, 2013

0 Comments

Astronomers Identify the Oldest Solar Twin

Using ESO’s Very Large Telescope, astronomers have identified the star HIP 102152 as the oldest solar twin known to date. An international team led by astronomers in Brazil has used ESO’s Very Large Telescope to identify and study the oldest solar twin known to date. Located 250 light-years from Earth, the star HIP 102152 is […]

Continue reading...

New Flicker Technique Measures Surface Gravity of Distant Stars

August 22, 2013

0 Comments

New Flicker Technique Measures the Surface Gravity of Distant Stars

Astronomers at Vanderbilt have developed a new flicker technique to measure the surface gravity of distant stars. The technique can also be used to significantly improve estimates of the sizes of recently discovered exoplanets. Astronomers have found a clever new way to slice and dice the flickering light from a distant star in a way […]

Continue reading...

Astronomers Discover Unusual Stars with Extremely High Concentrations of Lead in Their Atmospheres

August 2, 2013

1 Comment

Astronomers Discover Two Unusual Stars with High Concentrations of Lead in Their Atmospheres

While studying subdwarf stars, a team of astronomers discovered two unusual stars with extremely high concentrations of lead in their atmospheres. They estimate that the lead layer could be about 100km thick and weigh some 100 billion tonnes. In a paper published in the Oxford University Press journal Monthly Notices of the Royal Astronomical Society, […]

Continue reading...

Scientists Determine the Interior Rotation of a Sun-Like Star

July 30, 2013

0 Comments

Scientists Measure the Interior Rotation of a Distant Star

Using asteroseismic data obtained by the CoRoT space telescope, a team of scientists was able to measure the internal rotation of a Sun-like star and determine the inclination of its rotation axis. A team of researchers has devised a way to measure the internal properties of stars—a method that offers more accurate assessments of their […]

Continue reading...

Hubble Reveals Link Between Stars’ Ages and Their Orbits

July 19, 2013

0 Comments

Hubble Shows Link Between Stars Age and Orbit

Using the Hubble Space Telescope to track the orbital motion of over 30,000 stars in globular cluster 47 Tucanae, astronomers have revealed a link between stars’ ages and their orbits. Washington — Astronomers using NASA’s Hubble Space Telescope have determined the orbital motion of two distinct populations of stars in an ancient globular star cluster, […]

Continue reading...