Astronomy TOP STORY

Missing Matter And The Workings of The Galactic Ecosystem

© JAMES JOSEPHIDES (SWINBURNE ASTRONOMY PRODUCTIONS)

Artist conception of gas streams (blue) feeding a galactic disk.

Take a look at any galaxy in the universe through a telescope or in pictures captured by observatories and you might think you have a good idea of its shape.


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Astronomy TOP STORIES

Hubble Observes Tiny Galaxy with Big Heart

© STSCI

ESO 495-21

Nestled within this field of bright foreground stars lies ESO 495-21, a tiny galaxy with a big heart.

Starshade Would Take Formation Flying to Extremes

Starshade Would Take Formation Flying to Extremes

Anyone who's ever seen aircraft engaged in formation flying can appreciate the feat of staying highly synchronized while airborne.


The Formative Years: Giant Planets vs. Brown Dwarfs

The Formative Years: Giant Planets vs. Brown Dwarfs

Based on preliminary results from a new Gemini Observatory survey of 531 stars with the Gemini Planet Imager (GPI), it appears more and more likely that large planets and brown dwarfs have very different roots.


Citizen Scientists Re-tune Hubble's Galaxy Classification

Citizen Scientists Re-tune Hubble's Galaxy Classification

Hundreds of thousands of volunteers have helped to overturn almost a century of galaxy classification, in a new study using data from the longstanding Galaxy Zoo project.


Astronomers Determine Mass of Small Black Hole at Center of Nearby Galaxy

Astronomers Determine Mass of Small Black Hole at Center of Nearby Galaxy

If astronomers want to learn about how supermassive black holes form, they have to start small--really small, astronomically speaking.


Mature Galaxy NGC 7773 Mesmerizes In New Hubble View

Mature Galaxy NGC 7773 Mesmerizes In New Hubble View

This striking image was taken by the NASA/ESA Hubble Space Telescope's Wide Field Camera 3 (WFC3), a powerful instrument installed on the telescope in 2009. WFC3 is responsible for many of Hubble's most breathtaking and iconic photographs.


The Mystery Of The Galaxy With No Dark Matter Solved

The Mystery Of The Galaxy With No Dark Matter Solved

Galaxies with no dark matter are impossible to understand in the framework of the current theory of galaxy formation, because the role of dark matter is fundamental in causing the collapse of the gas to form stars.


Cool, Nebulous Ring Around Milky Way's Supermassive Black Hole

Cool, Nebulous Ring Around Milky Way's Supermassive Black Hole

New ALMA observations reveal a never-before-seen disk of cool, interstellar gas wrapped around the supermassive black hole at the center of the Milky Way.


A Giant Stellar Eruption Detected for the First Time

A Giant Stellar Eruption Detected for the First Time

A group of researchers has identified and characterized for the first time in a complete way a powerful eruption in the atmosphere of the active star HR 9024, marked by an intense flash of X-rays followed by the emission of a giant bubble of plasma, ie hot gas containing charged particles.


Planets Directly Seen Growing Around Young Star PDS 70

Planets Directly Seen Growing Around Young Star PDS 70

Astronomers have directly imaged two exoplanets that are gravitationally carving out a wide gap within a planet-forming disk surrounding a young star.


Heart of Lonesome Galaxy Is Brimming with Dark Matter

Heart of Lonesome Galaxy Is Brimming with Dark Matter

Isolated for billions of years, a galaxy with more dark matter packed into its core than expected has been identified by astronomers using data from NASA's Chandra X-ray Observatory.


NICER's Night Moves Trace the X-ray Sky

NICER's Night Moves Trace the X-ray Sky

In this image, numerous sweeping arcs seem to congregate at various bright regions.


Spitzer Captures Stellar Family Portrait

Spitzer Captures Stellar Family Portrait

In this large celestial mosaic taken by NASA's Spitzer Space Telescope, there's a lot to see, including multiple clusters of stars born from the same dense clumps of gas and dust. Some of these clusters are older than others and more evolved, making this a generational stellar portrait.


A New View of Exoplanets With NASA's Upcoming Webb Telescope

A New View of Exoplanets With NASA's Upcoming Webb Telescope

While we now know of thousands of exoplanets -- planets around other stars -- the vast majority of our knowledge is indirect.


Chandra Finds Stellar Duos Banished From Galaxies

Chandra Finds Stellar Duos Banished From Galaxies

Scientists have found evidence that pairs of stars have been kicked out of their host galaxies. This discovery, made using data from NASA's Chandra X-ray Observatory, is one of the clearest examples of stellar pairs being expelled from their galactic base.


Hubble Spies Curious Galaxy moving A Little Closer

Hubble Spies Curious Galaxy moving A Little Closer

This Hubble image stars Messier 90, a beautiful spiral galaxy located roughly 60 million light-years from the Milky Way in the constellation of Virgo (the Virgin). The galaxy is part of the Virgo Cluster, a gathering of galaxies that is over 1,200 strong.


Galaxies As Cosmic Cauldrons

Galaxies As Cosmic Cauldrons

Star formation within interstellar clouds of gas and dust, so-called molecular clouds, proceeds very rapidly yet highly "inefficiently".



More top stories from June.