Tag Archive for 'Star'

This artist’s illustration depicts what astronomers call a tidal disruption event. Image credit: NASA / CXC / M. Weiss.

Tidal Disruption Events Occur More Frequently than Thought

Feb 28, 2017 by News Staff

According to a team of astronomers at the University of Sheffield, UK, stars are ripped apart by supermassive black holes 100 times more often than previously...

A disc of rocky debris from a disrupted planetesimal surrounds the white dwarf-brown dwarf binary system SDSS 1557. Image credit: Mark Garlick, University College London, University of Warwick and University of Sheffield.

Planetary Debris Disk Detected around White Dwarf-Brown Dwarf System

Feb 27, 2017 by News Staff

Evidence of planetary debris surrounding a white dwarf and its substellar companion has been found by a University College London-led international team...

This artist’s impression shows the view from the surface of one of the exoplanets in the TRAPPIST-1 planetary system. Image credit: ESO / M. Kornmesser / Spaceengine.org.

TRAPPIST-1: Nearby Dwarf Star Hosts Seven Earth-Size Exoplanets

Feb 22, 2017 by News Staff

A system of seven exoplanets — three in their star’s habitable zone — has been found by an international team of astronomers. This artist’s...

Image showing a family tree of stars in the solar neighborhood. Image credit: University of Cambridge.

Astronomers Reconstruct History of Solar Neighborhood with Evolutionary Tree

Feb 21, 2017 by News Staff

A University of Cambridge-led team of astronomers, using chemical elements as a proxy for stellar DNA, has assembled an evolutionary family tree of stars...

An artist’s impression of PTFO8-8695 b, which is believed to orbit a star in the constellation Orion every 11 hours. Image credit: A. Passwaters / Rice University.

Astronomers Observe First Exoplanet-Induced Stellar Pulsations

Feb 14, 2017 by News Staff

Astronomers have detected strange pulsations in the outer shell of a star called HAT-P-2, and their best guess is that a closely orbiting exoplanet causes...

Artist’s concept of the super-Earth exoplanet GJ 411b. Image credit: Ricardo Ramirez.

Astronomers Reveal Catalog of Nearby Stars, Detect 114 Potential Exoplanets

Feb 13, 2017 by News Staff

Astronomers today released the largest-ever compilation of exoplanet-detecting observations made with a technique called radial velocity. They also demonstrated...

This artist’s impression shows AR Scorpii. In this unique double star a rapidly spinning white dwarf star (right) powers electrons up to almost the speed of light. These high energy particles release blasts of radiation that lash the companion red dwarf star (left) and cause the entire system to pulse dramatically every 1.97 minutes with radiation ranging from the ultraviolet to radio. Image credit: M. Garlick / University of Warwick / ESO.

Astronomers Find First Ever White Dwarf Pulsar

Feb 13, 2017 by News Staff

Astronomers have identified AR Scorpii — a binary stellar system in the constellation Scorpius, 380 light-years from Earth — as the first example...

This Hubble image shows a small portion of the southern sky in the constellation of Tucana. Image credit: NASA / ESA / Hubble.

Hubble Captures Scattered Stars, Galaxies in Tucana

Feb 13, 2017 by News Staff

This spectacular image, captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys, shows part of the sky in the constellation of...

This artist’s impression shows Proxima b orbiting Proxima Centauri, which at only 4.23 light-years is the closest star to our Solar System. The double star Alpha Centauri AB also appears in the image between the exoplanet and Proxima itself. Image credit: M. Kornmesser / ESO.

Exoplanets in Habitable Zones of Active Red Dwarfs May Face Oxygen Loss

Feb 11, 2017 by News Staff

A team of researchers led by Vladimir Airapetian, a solar scientist at NASA’s Goddard Space Flight Center, has developed a model that estimates the oxygen...

This artist’s impression shows a massive, comet-like object falling towards a white dwarf. Image credit: NASA / ESA / Z. Levy, STScI.

Hubble Finds Extrasolar Kuiper Belt Object Ripped Apart by White Dwarf

Feb 9, 2017 by News Staff

Astronomers have found the first evidence of the remains of a Kuiper Belt object analog scattered around a white dwarf star. The research was published...

The Large and Small Magellanic Clouds, their stellar halos and the RR Lyrae bridge: pale white veils and the narrow bridge between the Clouds represent the distribution of the RR Lyrae stars detected with the data from ESA’s Gaia satellite. Image credit: V. Belokurov / D. Erkal / A. Mellinger.

43,000-Light-Year-Long Stellar Bridge Connects Magellanic Clouds

Feb 8, 2017 by News Staff

The Large and Small Magellanic Clouds — the largest and most well-known dwarf galaxies in the Milky Way’s orbit — are connected by a 43,000...

This Hubble image shows the Calabash Nebula, which lies in the constellation of Puppis, about 5,000 light-years away. Image credit: NASA / ESA / Hubble / Judy Schmidt, www.geckzilla.com.

Hubble Space Telescope Spots ‘Cosmic Calabash’

Jan 30, 2017 by Enrico de Lazaro

A stunning new image of a little-known protoplanetary nebula, the Calabash Nebula, has been captured by the NASA/ESA Hubble Space Telescope. This Hubble...

Astronomers Characterize Wolf 1061 Planetary System

Jan 20, 2017 by Enrico de Lazaro

A research team led by San Francisco State University astronomer Stephen Kane has obtained new observations of Wolf 1061, known to host at least three...

An artist’s impression showing the increasing effect of ram-pressure stripping in removing gas from the spiral galaxy NGC 4921 and its satellite galaxies. Image credit: ICRAR / NASA / ESA / Hubble Heritage Team / STScI / AURA.

‘Ram-Pressure Stripping’ Shuts Off Star Formation in Galaxies, Astronomers Say

Jan 18, 2017 by News Staff

According to a new study published this week in the Monthly Notices of the Royal Astronomical Society, a phenomenon called ram-pressure stripping is more...

This Hubble image shows part of the sky in the constellation of Sagittarius. Image credit: NASA / ESA / Hubble.

Hubble Sees Brilliant Stars in Sagittarius

Jan 16, 2017 by News Staff

This colorful view of Milky Way was captured when the NASA/ESA Hubble Space Telescope pointed its Advanced Camera for Surveys (ACS) towards the constellation...

The six most common elements of life on Earth (including more than 97% of the mass of a human body) are carbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus. The colors in the spectra show dips, the size of which reveal the amount of these elements in the atmosphere of a star. The human body on the left uses the same color coding to evoke the important role these elements play in different parts of our bodies, from oxygen in our lungs to phosphorous in our bones (although in reality all elements are found all across the body). In the background is an artist’s impression of the Galaxy, with cyan dots to show the APOGEE measurements of the oxygen abundance in different stars; brighter dots indicate higher oxygen abundance. Image credit: Dana Berry / SkyWorks Digital Inc / SDSS.

Astronomers Map ‘Elements of Life’ in Milky Way Galaxy

Jan 14, 2017 by News Staff

At the 229th Meeting of the American Astronomical Society on Jan. 5, 2017, astronomers from the SDSS/APOGEE (Sloan Digital Sky Survey/Apache Point Observatory...

Stellar streams around the Milky Way Galaxy. Image credit: NASA / JPL-Caltech / R. Hurt, SSC & Caltech.

Milky Way’s Most Distant Stars Might Be Ripped from Sagittarius Dwarf Elliptical Galaxy

Jan 12, 2017 by News Staff

Milky Way’s 11 most distant stars are located roughly 300,000 light-years away from us. According to a team of astronomers at Harvard University, five...

An artist’s rendition of interior compositions of planets around Kepler-102 and Kepler-407. The picture shows what minerals are likely to occur several different depths. An exoplanet in orbit around Kepler-102 is Earth-like, dominated by olivine minerals, whereas a planet around Kepler-407 is dominated by garnet, so less likely to have plate tectonics. Image credit: Robin Dienel / Carnegie Institution.

Garnet Exoplanets Exist, But Can They Be Habitable?

Jan 11, 2017 by News Staff

Astronomers and geoscientists from the United States and Brazil have joined forces to study the mix of major rock-building elements in exoplanet-hosting...

This illustration shows several comets speeding across a vast protoplanetary disk of gas and dust and heading straight for the youthful, central star HD 172555. These exocomets will eventually plunge into the star and vaporize. HD 172555 represents the third extrasolar system where astronomers have detected doomed, wayward comets. All of the systems are young, under 40 million years old. Image credit: NASA / ESA / A. Feild & G. Bacon, STScI.

Astronomers Detect Exocomets Falling into HD 172555

Jan 8, 2017 by News Staff

Exocomets are plunging into HD 172555, a nearby young star surrounded by a debris disk, according to a team of astronomers led by Carol Grady of NASA’s...

This image of Orion A is composed of near-infrared observations from ESO’s VISTA survey telescope. Image credit: ESO / VISION Survey.

VISTA Captures Detailed Image of Orion A

Jan 4, 2017 by Enrico de Lazaro

This striking image, captured by ESO’s Visible and Infrared Survey Telescope for Astronomy (VISTA), shows the Orion A molecular cloud, the nearest known...

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