Tag Archive for 'Variable star'

This false-color image of Polaris, captured by the CHARA Array in April 2021, reveals large bright and dark spots on the star’s surface. Image credit: Evans et al., doi: 10.3847/1538-4357/ad5e7a.

Astronomers Find Spots on Surface of Polaris

Aug 20, 2024 by News Staff

Astronomers using the Center for High Angular Resolution Astronomy (CHARA) Array have observed Polaris, a member of a triple system and the nearest and...

This Hubble image shows two stars: the Orion variable star V 372 Orionis and the emission-line star BD-05 1307. Image credit: NASA / ESA / Hubble / J. Bally / M. Robberto.

Hubble Spots Two Prominent Stars in Orion Nebula

Jan 23, 2023 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have taken a detailed image of a small part of the famous Orion Nebula. This Hubble image shows two...

This Hubble image shows NGC 6956, a barred spiral galaxy some 215 million light-years away in the constellation of Delphinus. Image credit: NASA / ESA / D. Jones, University of California, Santa Cruz / Gladys Kober, NASA & Catholic University of America.

Hubble Space Telescope Spots Cepheid Variables in NGC 6956

Dec 17, 2022 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have imaged the barred spiral galaxy NGC 6956, which is found in the constellation of Delphinus. This...

The interstellar dust map made with Gaia’s data release 3. Image credit: ESA / Gaia / DPAC.

ESA’s Gaia Mission Releases Its Third Full Dataset

Jun 14, 2022 by News Staff

Gaia’s data release 3 (DR3) contains new and improved details for almost 2 billion stars in our Milky Way Galaxy as well as for a subset of solar system...

This image of the Carina Nebula reveals the dynamic cloud of interstellar matter and thinly spread gas and dust as never before; the massive stars in the interior of this cosmic bubble emit intense radiation that causes the surrounding gas to glow; by contrast, other regions of the nebula contain dark pillars of dust cloaking newborn stars. Image credit: ESO / J. Emerson / M. Irwin / J. Lewis.

Astronomers Discover 116,027 New Variable Stars

Jun 1, 2022 by News Staff

Using machine learning techniques and data from the All-Sky Automated Survey for Supernovae (ASAS-SN) and several other surveys, astronomers have identified...

This ALMA image shows the planet-forming disk around the young star RU Lupi. The inset image (lower left, red disk) shows the DSHARP observation of the dust disk with rings and gaps that hint at the presence of forming planets. The new observation shows a large spiral structure (blue), made out of gas, that spans far beyond the compact dust disk. Image credit: ALMA / ESO / NAOJ / NRAO / J. Huang and S. Andrews / AUI / NSF / S. Dagnello.

ALMA Spots Gaseous Spiral Arms around Young Variable Star

Aug 4, 2020 by News Staff

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have discovered a giant set of spiral arms around the young variable star RU...

This illustration shows what the luminous blue variable star in PHL 293B could have looked like before its mysterious disappearance. Image credit: L. Calçada / ESO.

Massive Variable Star Mysteriously Disappears from Distant Dwarf Galaxy

Jun 30, 2020 by News Staff

Using the X-SHOOTER and the ESPRESSO (Echelle Spectrograph for Rocky Exoplanet- and Stable Spectroscopic Observation) instruments on ESO’s Very Large...

An artist’s impression of a Delta Scuti star. Image credit: NASA’s Goddard Space Flight Center.

TESS Detects Elusive Pulsation Patterns in Delta Scuti Stars

May 14, 2020 by News Staff

Astronomers using NASA’s Transiting Exoplanet Survey Satellite (TESS) have detected pulsation patterns in the so-called Delta Scuti stars, a large group...

This Hubble image shows RS Puppis, one of the most luminous in the class of Cepheid variable stars. Image credit: NASA / ESA / Hubble Heritage Team / STScI / AURA / H. Bond, STScI and Pennsylvania State University.

Hubble Catalog of Variable Sources Released

Sep 27, 2019 by News Staff

Using data collected by the NASA/ESA Hubble Space Telescope, astronomers have created the deepest ever catalog of variable sources (variable stars in our...

From a great distance, our Milky Way Galaxy would look like a thin disk of stars that orbits once every few hundred million years around its central region, where hundreds of billions of stars provide the gravitational ‘glue’ to hold it all together. But this pull of gravity is much weaker in the Galaxy’s far outer disk. There, the hydrogen atoms making up most of the Milky Way’s gas disk are no longer confined to a thin plane, instead they give the disk an S-like, or warped, appearance. Image credit: Xiaodian Chen.

New 3D Map of Milky Way Reveals True Shape of Its Stellar Disk

Feb 5, 2019 by News Staff

An international team of astronomers has used 1,339 classical Cepheid stars — pulsating variable stars each up to 100,000 brighter than our Sun —...

Hubble Observes Variable Star RS Puppis and Surrounding Nebula

Dec 25, 2018 by News Staff

NASA has released a striking photo taken by the NASA/ESA Hubble Space Telescope of RS Puppis, a Cepheid type variable star. The brightest star in the Hubble...

An artist’s impression of a binary stellar system. Image credit: L. Calçada / ESO.

Did Ancient Egyptian Scribes Discover Algol’s Variability 3,000 Years before European Astronomers?

Nov 16, 2018 by News Staff

An ancient Egyptian Calendar of Lucky and Unlucky Days assigns luck with the period of 2.85 days. Previous astronomical, astrophysical and statistical...

This image from Kepler shows members of the Pleiades star cluster taken during Campaign 4 of the K2 Mission. Kepler was not designed to look at stars this bright; they cause the camera to saturate, leading to long spikes and other artifacts in the image. Despite this serious image degradation, the new technique has allowed astronomers to carefully measure changes in brightness of these stars as Kepler observed them for almost three months. Image credit: NASA / Aarhus University / T. White.

NASA’s Kepler Space Telescope Discovers Variability in Pleiades

Aug 25, 2017 by News Staff

Using a novel photometric technique to enhance observations from NASA’s Kepler Space Telescope, astronomers have performed the most detailed study yet...

Text of Cairo Calendar page rto VIII; inside the superimposed rectangle is the hieratic writing for the word Horus. A passage in this document dates it to the reign of Ramses II in the Nineteenth Dynasty. Image credit: Jetsu L. / Porceddu S., doi: 10.1371/journal.pone.0144140.s001.

3,200-Year-Old Papyrus Contains Astrophysical Information about Variable Star Algol

Dec 23, 2015 by Sergio Prostak

Ancient Egyptians wrote Calendars of Lucky and Unlucky Days that assigned astronomically influenced prognoses for each day of the year. The best preserved...

This image from Hubble’s Advanced Camera for Surveys shows the quadruple star system DI Cha. Image credit: NASA / ESA / Hubble / Judy Schmidt, geckzilla.org.

Hubble Space Telescope Zeros in on Quadruple Star System

Oct 26, 2015 by News Staff

The NASA/ESA/Hubble Heritage Team has released a stunning image of a complex star system known as DI Cha. This image from Hubble’s Advanced Camera for...

This image from Hubble shows the T Tauri variable star V1331 Cyg. Image credit: ESA / Hubble / NASA / Karl Stapelfeldt, GSFC / B. Stecklum & A. Choudhary, Thüringer Landessternwarte Tautenburg.

Hubble Sees Young Star V1331 Cyg, Its Nebular Environment

Mar 3, 2015 by News Staff

Astronomers using NASA’s Hubble Space Telescope have captured a striking image of a young variable star known as V1331 Cyg and its dusty environment. This...

Fractal. Image credit: G. Stolyarov / CC BY-SA 3.0.

Scientists Find Fractal Patterns in Variable Stars

Feb 9, 2015 by News Staff

A team of researchers led by Dr John Lindner from the University of Hawaiʻi at Mānoa and the College of Wooster, Ohio, has found evidence for fractal...

This image shows the variable star RS Puppis. Image credit: NASA / ESA / the Hubble Heritage Team / STScI / AURA / Hubble-Europe Collaboration / H. Bond, STScI and Penn State University.

Hubble Zooms in on Variable Star RS Puppis

Dec 26, 2013 by News Staff

Astronomers using NASA’s Hubble Space Telescope have observed RS Puppis – a type of star known as a Cepheid variable star – over a period...

The open star cluster NGC 3766 is located in the constellation of Centaurus. New observations of NGC 3766’s stars have shown that 36 of them are of a new and unknown class of variable stars (ESO)

Astronomers Discover New Class of Variable Stars

Jun 12, 2013 by Natali Anderson

Multi-band observations of NGC 3766, an open star cluster located about 5,500 light-years away in the constellation Centaurus, have yielded the discovery...