Tag Archive for 'Galaxy'

Our Milky Way Galaxy is surrounded by an enormous halo of plasma (seen in blue in this artists’ rendition). Image credit: NASA / CXC / M.Weiss / Ohio State / A. Gupta et al.

Milky Way’s Halo is Disk-Like and Clumpy, Study Shows

Oct 20, 2020 by News Staff

Using X-ray data from NASA’s HaloSat minisatellite, astronomers have found that our Milky Way Galaxy is surrounded by a clumpy halo of hot gases that...

This Hubble image shows interacting galaxies NGC 2798 (right) and NGC 2799 (left). The color image includes optical and near-infrared observations from Hubble’s Advanced Camera for Surveys (ACS). Three filters were used to sample various wavelengths. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / SDSS / J. Dalcanton / Judy Schmidt, www.geckzilla.com.

Hubble Space Telescope Spots Colliding Galaxy Pair

Oct 19, 2020 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have captured a spectacular image of two interacting spiral galaxies: NGC 2798 and NGC 2799. This...

Astronomers Monitor Flare from Nearby, Fast-Evolving Tidal Disruption Event

Oct 13, 2020 by News Staff

Using ESO’s Very Large Telescope (VLT) and New Technology Telescope (NTT), the Las Cumbres Observatory global telescope network, and NASA’s Neil Gehrel...

This mosaic of the northern sky incorporates 208 images taken by TESS during its second year of science operations, completed in July 2020. The mission split the northern sky into 13 sectors, each of which was imaged for nearly a month by the spacecraft’s four cameras. Among the many notable celestial objects visible: the glowing arc and obscuring dust clouds of the Milky Way (left); the Andromeda Galaxy (oval, center left), our nearest large galactic neighbor located 2.5 million light-years away; and the North America Nebula (lower left), part of a stellar factory complex 1,700 light-years away. The prominent dark lines are gaps between the detectors in TESS’ camera system. Image credit: NASA / MIT / TESS / Ethan Kruse, USRA.

TESS Captures Beautiful Panorama of Northern Sky

Oct 6, 2020 by News Staff

Assembled from 208 images captured by NASA’s Transiting Exoplanet Survey Satellite (TESS) during its second year of science operations, this striking...

Visualization of the new gauge developed to test the predictions of modified gravity theories against the measurement of the size of M87*’s shadow. Image credit: D. Psaltis, University of Arizona / EHT Collaboration.

Shadow of Messier 87’s Supermassive Black Hole Puts General Relativity to Test

Oct 2, 2020 by News Staff

The 2017 observations from the Event Horizon Telescope (EHT) of M87*, a 6.5-billion-solar-mass black hole in the center of the giant elliptical galaxy...

This artist’s impression shows a supermassive black hole in the center of SDSS J1030+0524 and six galaxies -- four Lyman-break galaxies and two Lyman-alpha emitting galaxies -- trapped in its gas web. The large web-like structure extends over 300 times the size of the Milky Way. Image credit: L. Calçada / ESO.

Web of the Giant: Astronomers Spot Six Galaxies around Monster Quasar

Oct 2, 2020 by News Staff

Using the MUSE and FORS2 instruments on ESO’s Very Large Telescope (VLT), astronomers have spotted a group of six galaxies around SDSS J1030+0524, a...

This Chandra/ACIS-S image shows XRSs (colored points) in Messier 51; M51-ULS-1 is the orange source in the center of the blue box; diffuse emission is from hot gas. Image credit: Di Stefano et al., arXiv: 2009.08987.

Chandra Spots Possible Extragalactic Planet in Messier 51

Oct 2, 2020 by Natali Anderson

Astronomers using NASA’s Chandra X-ray Observatory have detected an extragalactic candidate planet circling a binary system in Messier 51 (also known...

This Hubble images shows SN 2018gv (a very bright star located on the outer edge of one of the galaxy’s spiral arms in the left portion of the image) in the barred spiral galaxy NGC 2525. Image credit: NASA / ESA / Hubble / A. Riess & SH0ES Team / Mahdi Zamani.

Hubble Observes Spectacular Supernova in NGC 2525

Oct 1, 2020 by News Staff

Astronomers using the NASA/ESA Hubble Space Telescope have tracked the fading light of a Type Ia supernova in NGC 2525, a barred spiral galaxy located...

Abdullah et al. determined that matter makes up about 31% of the total amount of matter and energy in the Universe. Image credit: Mohamed Abdullah, University of California Riverside.

Astrophysicists Measure Total Amount of Matter in Universe

Sep 29, 2020 by News Staff

Using data on a sample of 756 galaxy clusters identified in the Sloan Digital Sky Survey (SDSS), a team of astrophysicists from the United States and Egypt...

An artist’s impression of BOSS-EUVLG1, a star-forming galaxy located some 12 billion light-years away in the constellation of Virgo. Image credit: Gabriel Pérez Díaz, SMM / IAC.

Astronomers Discover Most Luminous, Un-Obscured Star-Forming Galaxy Ever Seen

Sep 28, 2020 by Natali Anderson

A young starburst galaxy named BOSS-EUVLG1 is by far the most luminous, almost un-obscured star-forming galaxy known at any redshift. An artist’s impression...

This Hubble image shows NGC 5643, a grand design spiral galaxy some 55 million light-years away in the constellation of Lupus. The color image is composed of infrared and optical observations from Hubble’s Wide Field Camera 3 (WFC3). It is based on data obtained through four filters. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / A. Riess et al / Mahdi Zamani.

Hubble Observes Grand Design Spiral Galaxy: NGC 5643

Sep 28, 2020 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have captured an absolutely beautiful image of the spiral galaxy NGC 5643. This Hubble image shows...

The EHT Collaboration unveiled the first direct visual evidence of the supermassive black hole in the center of the elliptical galaxy Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary -- the event horizon from which the EHT takes its name -- is around 2.5 times smaller than the shadow it casts and measures just under 25 billion miles (40 billion km) across. Image credit: EHT Collaboration.

Crescent Shadow of Messier 87’s Supermassive Black Hole is Wobbling

Sep 23, 2020 by News Staff

In 2019, the Event Horizon Telescope (EHT) delivered the first resolved images of M87*, the supermassive black hole in the center of the giant elliptical...

This Hubble image shows the spiral galaxy NGC 5585. Hotspots of star formation can be seen along the galaxy’s faint spiral arms. These regions shine a brilliant blue, contrasting strikingly against the ever-black background of space. The color image is made up of observations from Hubble’s Advanced Camera for Surveys (ACS) in the near-infrared and optical parts of the spectrum. Two filters were used to sample various wavelengths. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / R. Tully / Gagandeep Anand.

Hubble Spots Dark Matter-Rich Spiral Galaxy

Sep 21, 2020 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have captured a striking new photo of an unusual spiral galaxy called NGC 5585. This Hubble image...

This Hubble image shows NGC 2835, an intermediate spiral galaxy approximately 28.5 million light-years away in the constellation of Hydra. The color image was made from separate exposures taken in the ultraviolet, visible and near-infrared regions of the spectrum with Hubble’s Wide Field Camera 3 (WFC3). It is based on data obtained through five filters. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / J. Lee / PHANGS-HST Team / Judy Schmidt, www.geckzilla.com.

Hubble Sees Stunning Face-On Spiral Galaxy: NGC 2835

Sep 14, 2020 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have produced a spectacularly detailed image of NGC 2835, a face-on intermediate spiral galaxy with...

This Hubble image shows the massive galaxy cluster MACSJ 1206. Embedded within the cluster are the distorted images of distant background galaxies, seen as arcs and smeared features. These distortions are caused by the dark matter in the cluster, whose gravity bends and magnifies the light from faraway galaxies, an effect called gravitational lensing. This phenomenon allows astronomers to study remote galaxies that would otherwise be too faint to see. Overlaid on the image are small-scale concentrations of dark matter, represented in this artist’s impression in blue. Dark matter is the invisible glue that keeps stars bound together inside a galaxy and makes up the bulk of the matter in the Universe. These blue halos reflect how the galaxy cluster’s dark matter is distributed, revealed by new results from Hubble. Image credit: NASA / ESA / Hubble / G. Caminha, University of Groningen / M. Meneghetti, Observatory of Astrophysics and Space Science of Bologna / P. Natarajan, Yale University / CLASH Team / M. Kornmesser.

New Observations Suggest Missing Ingredient in Current Dark Matter Theories

Sep 11, 2020 by News Staff

The large mass of a galaxy cluster deflects light from background objects, a phenomenon known as gravitational lensing. The large-scale gravitational lens...

SN LSQ14fmg exploded in SDSS J221646.15+152114.2, a star-forming galaxy 100 million light-years away. Image credit: Hsiao et al, doi: 10.3847/1538-4357/abaf4c.

Astronomers Observe Slowest Rising Type Ia Supernova Ever Seen

Sep 10, 2020 by News Staff

The exaggerated properties of a Type Ia supernova dubbed SN LSQ14fmg may help reveal the origin of the ‘super-Chandrasekhar’ group of supernovae it...

The NASA/ESA Hubble Space Telescope took this image of NGC 1052-DF2 on November 16, 2017. Image credit: NASA / ESA / P. van Dokkum, Yale University.

Self-Interacting Dark Matter Helps Explain Formation of Dark-Matter-Deficient Galaxies

Sep 10, 2020 by News Staff

The so-called self-interacting dark matter theory helps explain why NGC 1052-DF2 and NGC 1052-DF4, a pair of ultra-diffuse galaxies located approximately...

The Magellanic Stream in zenithal equal-area coordinates: (a) observed H I data for the Magellanic Stream, with the line-of-sight velocity indicated by the color scale and the relative gas column density indicated by the brightness; the points represent the sightlines with ultraviolet-absorption-line observations from the NASA/ESA Hubble Space Telescope, colored by their line-of-sight velocity; these points show the extent of the ionized gas associated with the stream; (b) the results of the model including the Magellanic Corona and the Milky Way’s hot corona; gas originating in the disks of the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC) is shown in the model, without separating neutral gas from ionized gas; this affects the morphology of the stream, causing the model to appear smoother and less fragmented than the data; however, the model reproduces the current spatial location and velocity of both clouds, and the velocity gradient of the gas along the stream; the Milky Way disk and background are extracted from real H I images. Image credit: Lucchini et al, doi: 10.1038/s41586-020-2663-4.

Huge Halo of Warm Gas around Magellanic Clouds is Key to Formation of Magellanic Stream

Sep 9, 2020 by News Staff

A team of astronomers from Australia and the United States has found that a halo of warm ionized gas surrounding the Large and Small Magellanic Clouds...

An artist’s impression of binary black holes about to collide. Image credit: Mark Myers, ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), Australian National University.

Astronomers Witness Birth of Intermediate-Mass Black Hole

Sep 2, 2020 by News Staff

Astronomers using the twin LIGO detectors located in Livingston, Louisiana, and Hanford, Washington, and the Virgo detector located near Pisa, Italy, have...

An artist’s impression of plasma jets coming from a supermassive black hole in the central galaxy of the Phoenix cluster. Image credit: NAOJ.

Astronomers Detect Black-Hole Jets in Central Galaxy of Phoenix Cluster

Sep 1, 2020 by Enrico de Lazaro

Astronomers using the Australia Telescope Compact Array (ATCA) have detected plasma jets coming from a supermassive black hole in the central galaxy of...

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