Dark Energy The universe seems to be pervaded with a...
Dark Matter In the universe, what you see is certainly not...
Age of the Universe Most astronomers agree that the observable...
Finding Earth-Like Planets Astronomers have discovered far more planets...
Exoplanets As the list of known planets beyond the solar...
Black Holes A black hole is invisible, but astronomers can...

Featured Images

Hubble Space Telescope view of the Gliese 229 system
Faint Neighbors Sunday, February 7, 2016
Strong winds blowing from a black hole in a distant spiral galaxy
Windy Black Hole Friday, January 15, 2016
The odd galaxy NGC 660
Busy Galaxy Friday, December 18, 2015
Jets from a protostar in Serpens
Huffing and Puffing Friday, November 6, 2015
Artist's concept of the star system 51 Pegasi, featuring a giant planet
The First Monday, October 12, 2015
Animated view of an erupting black hole
Big Gulp Aftermath Tuesday, September 15, 2015
Artist's concept of a young Jupiter-like planet
Young Giant Thursday, August 27, 2015
The system V664 Cassiopeia is creating a planetary nebula
Bread Crumbs Thursday, July 23, 2015
Artist's concept of a moons orbiting a Jupiter-like exoplanet
Worlds of Worlds Tuesday, June 9, 2015
Ringfest Wednesday, May 20, 2015
Artist's concept of Scholz's Star passing close to the solar system
Former Neighbor Thursday, May 7, 2015
Hubble Space Telescope image of a young star cluster
Anniversary Portrait Thursday, April 23, 2015
G2 survives its swing around the black hole at the center of the Milky Way
Narrow Escape Friday, March 27, 2015
Artist's concept of MY Camelopardalis, a contact binary star system
Close Twins Sunday, March 15, 2015
COBE view of the cosmic microwave background
Afterglow Tuesday, November 18, 2014
View of a newly forming planetary system around the young star HL Tauri
Planet Tracks Thursday, November 6, 2014
Jetting Across the Universe Tuesday, August 12, 2014
Artist's concept of hot gas funneling toward black hole at center of Milky Way
Dark Center Tuesday, July 29, 2014
Simulation of the early universe
Tangled Web Saturday, May 10, 2014
Diagram showing the layouts of several exoplanet systems
Going Farther Wednesday, April 30, 2014
Artist's concept of a range of recently discovered exoplanets
Planet Hunting Monday, April 28, 2014
Artist's concept of black hole binary star system in the galaxy M101
Brilliant Darkness Thursday, January 16, 2014
Technicians replace equipment for HETDEX at McDonald Observatory
On (and Off) Track Monday, November 4, 2013
Artist's concept of extrasolar planet Kepler 78b, an Earth-sized world
Hot Rock Thursday, October 31, 2013
The Planck space telescope and its view of the cosmic microwave background
Going Dark Thursday, October 24, 2013
The Cat's Paw Nebula in submillimeter and near-infrared light
Star Maker Friday, September 27, 2013
Artist's concept of planet HAT-P7b
Hot Spot Friday, August 16, 2013
Hubble image of a galaxy cluster and the deduced location of its dark matter
Dark Universe Monday, August 5, 2013
Artist's concept of a blue exoplanet
Blue-Hot Planet Saturday, July 13, 2013
Starbirth region on the edge of the Milky Way galaxy
Starbirth Thursday, June 6, 2013
A black hole is created in the Large Hadron Collider, then quickly evaporates
Making a Black Hole Tuesday, February 26, 2013
Artist's concept of the Milky Way galaxy and its dark matter halo
Illuminating the Darkness Saturday, February 9, 2013
Combined optical and X-ray view of two possible black holes in the galaxy IC 342
On the Job Tuesday, January 8, 2013
Artist's concept of the Gamma Cephei star system
Stellar Geometry Tuesday, September 4, 2012
A flare on the surface of the star HD 189733 blasts away the atmosphere of an or
Zapped! Friday, June 29, 2012
The remnants of two merged galaxies
Fast Exit Monday, June 18, 2012
Hubble Space Telescope view of galaxy ESO 243-49
Little Giant Tuesday, May 29, 2012
Simulation of a supermassive black hole disrupting a star
Messy Meal Friday, May 4, 2012
Artist's concept of the Kepler-35 system, with a giant planet orbiting two stars
Seeing Double Wednesday, April 4, 2012
Artist's concept of stars and a gas cloud near the Milky Way's central black hol
Snack Time Thursday, March 29, 2012
Artist's concept of TW Hydra, a young star encircled by a disk of gas and dust
Messy Youngster Monday, April 25, 2011
New stars and the raw materials for more stars in the stellar nursery NGC 6729
Star Maker Thursday, March 24, 2011
X-ray and radio image of galaxy M87
Close to the Monster Thursday, March 10, 2011
Irregular galaxy Henize 2-10, which appears to contain a supermassive black hole
Small But Powerful Tuesday, March 8, 2011
Earth is in the middle of the Sun's habitable zone
In the Zone Tuesday, January 18, 2011
Hobby-Eberly Telescope at McDonald Observatory
Searching the Darkness Friday, October 15, 2010
Evaporating planet around the star HD209458
Puffy Planet Thursday, August 26, 2010
M87 black hole
Busy Black Hole Wednesday, August 11, 2010
This giant cluster of galaxies and hot gas provides evidence of dark matter.
Cosmic Bullets Tuesday, July 20, 2010
Hot young stars carve beautiful shapes in surrounding clouds of gas and dust.
Stellar Sculptors Thursday, July 15, 2010
The Milky Way galaxy and the afterglow of the Big Bang make up this all-sky imag
A Little of Everything Tuesday, July 6, 2010

Radio Programs

Switching On Switching on the heart of a galaxy Friday, December 18, 2015
Light-Year Speeding across the universe Friday, November 20, 2015
Runaway Star A stellar “runaway” in the charioteer Saturday, November 14, 2015
Moon and Aldebaran Patiently watching the bull’s eye Thursday, October 29, 2015
Tau Ceti De-populating a popular star system Wednesday, October 14, 2015
Hot Planet A world you wouldn’t want to visit Tuesday, October 13, 2015
51 Pegasi A puffy planet gets some attention Monday, October 12, 2015
Moon and Companions Bright companions for the Moon Wednesday, October 7, 2015
Rare Gems Yellow gems from the water bearer Saturday, October 3, 2015
More Cosmic Background Taking the universe’s temperature Friday, October 2, 2015
Cosmic Background The crackle of the Big Bang Thursday, October 1, 2015
Mirach Stars at opposite ends of the scale Tuesday, September 29, 2015
Dabih A dizzying system of stars Wednesday, September 23, 2015
Luminous Red Novae One star born from two Thursday, September 3, 2015
Hunting Planets IV Patiently looking for planets Saturday, August 29, 2015
Hunting Planets III Looking for big, cold planets Friday, August 28, 2015
Hunting Planets II More nights hunting for planets Thursday, August 27, 2015
Hunting Planets Getting ready to hunt planets Wednesday, August 26, 2015
Far, Far Away Mapping the distance to the galactic center Friday, August 14, 2015
Making a Magnetar Making a powerful magnet Thursday, August 6, 2015
Delta Cephei A surprise from a well-known star Monday, August 3, 2015
Delta Cygni Spreading out a stellar trio Friday, July 31, 2015
Future Outbursts Setting up future outbursts Friday, July 24, 2015
Bread Crumbs Leaving a trail of breadcrumbs Thursday, July 23, 2015
Doomed Stars Two stars with a bright future Wednesday, June 17, 2015
Doomed Planets Planets with limited lifetimes Friday, June 12, 2015
Day and Night Day and night on distant planets Thursday, June 11, 2015
Exoplanets An astounding variety of planets Tuesday, June 9, 2015
Moon and Leo “Weighing” two giant stars Sunday, May 24, 2015
Moon and Jupiter Jupiter loses its status Saturday, May 23, 2015
Saturn at Opposition III Drawing rings around a giant planet Wednesday, May 20, 2015
Former Neighbor Discovering a one-time neighbor Thursday, May 7, 2015
Future Quadruplets A star cloud prepares to give birth Thursday, April 16, 2015
The Search Continues The search for planets continues Monday, April 13, 2015
MY Camelopardalis A brilliant duet for the giraffe Sunday, March 15, 2015
Seeing the Past Looking at the solar system’s past Sunday, March 1, 2015
Fewer New Stars A decline in the stellar birth rate Thursday, February 26, 2015
Triple Play A triple play in the evening sky Thursday, February 19, 2015
Cancer Grabbing a toe was a bad idea Sunday, February 15, 2015
Beta Monocerotis A brilliant set of triplets Tuesday, February 10, 2015
Celestial Equator Splitting the night sky in half Saturday, January 31, 2015
Cold Dark Matter Getting cold to catch dark matter Tuesday, January 27, 2015
Soudan Laboratory Digging deep for dark matter Monday, January 26, 2015
Binary Planets Two planets for the price of one Tuesday, January 20, 2015
Close Escape A black hole snacks on a star Tuesday, January 13, 2015
Survivor The heart of the galaxy stays quiet Monday, January 12, 2015
Moon and Aldebaran A game of cat and mouse in the night sky Thursday, January 1, 2015
Hot Weather Hot weather on a distant planet Friday, December 26, 2014
Moon and Aldebaran A 20-parsec jaunt across the galaxy Friday, December 5, 2014
Fast Day A planet that spins in a hurry Tuesday, December 2, 2014
Rara Avis II Dancing with the firebird Sunday, November 30, 2014
Epsilon Aurigae Playing Frisbee with a bright star Sunday, November 23, 2014
Big Bang Starting a universe with a bang Wednesday, November 19, 2014
COBE Deciphering the static of the early universe Tuesday, November 18, 2014
New Names Spicing up the names of distant worlds Monday, October 20, 2014
Moon and Aldebaran Avoiding a celestial collision Saturday, October 11, 2014
Black Hole Reality The reality about black holes Friday, October 10, 2014
Event Horizon An astronomical point of no return Thursday, October 9, 2014
Three-Headed Monster A trio of giant black holes Wednesday, October 8, 2014
Rasalhague The head of the serpent bearer Sunday, September 7, 2014
Paper Black Holes Laying the groundwork for black holes Monday, September 1, 2014
Doomed Planets Doomed planets around a dying star Sunday, August 24, 2014
Planet Bonanza A plenitude of exoplanets Saturday, August 23, 2014
Construction Zone A busy construction zone around a star Monday, August 11, 2014
Sigma Scorpii Impressive stars near the scorpion’s heart Saturday, August 9, 2014
Moon and Companions The scorpion’s southern claw Sunday, August 3, 2014
WIMP-y Glow Bright evidence of dark matter Wednesday, July 30, 2014
Dark Center Darkness in the heart of the galaxy Tuesday, July 29, 2014
Mars and Spica Two lights passing in the night sky Thursday, July 10, 2014
Close Quartet A nearby stellar quartet Sunday, June 22, 2014
Companionship Looking for stellar companions Thursday, May 29, 2014
Too Close Getting too close to a dark monster Sunday, May 18, 2014
Rasalhague A preview of coming attractions Saturday, May 17, 2014
Distant Planets IV Young planets on the move Thursday, May 1, 2014
Distant Planets III A giant planet near the head of the water snake Wednesday, April 30, 2014
Distant Planets II A patient search for distant planets Tuesday, April 29, 2014
Distant Planets Looking for hard-to-find planets Monday, April 28, 2014
61 Virginis Some nearby planetary neighbors Friday, April 25, 2014
Moon and Venus Racking up the frequent-flyer miles Thursday, April 24, 2014
Emptiness The emptiness between the stars Monday, April 21, 2014
Moon and Antares A journey to a stellar supergiant Friday, March 21, 2014
In-Between Planets Super-Earths and mini-Neptunes Tuesday, March 4, 2014
Earths Galore Earth-like planets by the millions Saturday, February 22, 2014
Z Machine Firing the world’s biggest X-ray machine Monday, February 3, 2014
M101 ULX-1 Weirdness in a nearby galaxy Thursday, January 16, 2014
Black Hole Collisions Tiny threats rip through Earth Wednesday, January 15, 2014
EX Hydrae Two small but busy stars Thursday, December 19, 2013
NGC 660 The glow of escaping table scraps Tuesday, December 17, 2013
Blue-Hot Planet A visit to another blue planet Monday, December 2, 2013
Andromeda Galaxy II Black holes in a neighboring galaxy Friday, November 8, 2013
Pleiades White Dwarf A star that went gently into the night Saturday, October 12, 2013
Merging Stars Two stars that become one Saturday, October 5, 2013
Gaia Counting up the stars Thursday, October 3, 2013
Moon and Jupiter Looking for a giant planet Saturday, September 28, 2013
ER Vulpeculae Two stars locked in a tight embrace Friday, September 27, 2013
Moon and Aldebaran Looking 67 years back in time Tuesday, August 27, 2013
Equuleus Two stars whose fates are intertwined Saturday, August 24, 2013
HAT P-7 Cooling off a distant star Friday, August 16, 2013
Toasted Planets Toasting planets from the inside out Thursday, August 15, 2013
Dark Detections Looking for particles that don’t wimp out Wednesday, August 7, 2013
Dark Experiments Looking for the unseeable Tuesday, August 6, 2013
Dark Universe Adding up the universe Monday, August 5, 2013
Black Hole Beacon A black hole announces its presence Thursday, July 25, 2013
Galactic Bubbles Keeping food from a black hole Wednesday, July 24, 2013
Barnard 68 Lighting up a dark cloud Sunday, July 7, 2013
Albireo A colorful stellar duo Saturday, July 6, 2013
‘Medium’ Nova A mid-size stellar explosion Tuesday, July 2, 2013
Anti-Discovery The possible signature of dark matter Wednesday, June 26, 2013
Solar Twins II Hunting for worlds like Earth Sunday, June 2, 2013
Close Companions A black hole devours a companion Monday, May 20, 2013
Setting a Date Zeroing in on the Big Bang Monday, May 13, 2013
Model Cosmos Taking the measure of the solar system Friday, May 3, 2013
Alpha Centauri Planet A nearby planetary neighbor Sunday, April 21, 2013
Tau Boötis Keeping an eye on a star with a planet Sunday, April 7, 2013
Dark Energy Camera Some impressive astronomical snapshots Thursday, March 14, 2013
Pulsar Planets Reborn from a violent demise Tuesday, March 12, 2013
Planetary Debris Rocky evidence of planetary systems Monday, March 11, 2013
In the Zone Comfortable worlds around feeble stars Sunday, March 10, 2013
Lots of Planets Strength of discovery in numbers Saturday, March 9, 2013
Four Suns A world with four suns in the sky Friday, March 8, 2013
Ringing Beat The beat of vibrating stars Wednesday, March 6, 2013
Moon and Spica Illumination from a disappearing act Thursday, February 28, 2013
Small Black Holes II Black holes that fizzle in a hurry Tuesday, February 26, 2013
Small Black Holes Looking for tiny black holes Monday, February 25, 2013
Yardsticks Measuring astronomical distances Saturday, February 23, 2013
Nowhere to Hide Hiding in plain sight Thursday, January 31, 2013
Bright Black Hole Brightness from the ultimate darkness Wednesday, January 30, 2013
Hot Planet The glow of a small but hot planet Thursday, January 24, 2013
Moon and Jupiter Tiny planets around a tiny star Sunday, March 25, 2012
Moon and Companions Nothing to fear in the morning sky Saturday, December 8, 2012
First Steps Angling in on the stars Wednesday, December 5, 2012
Triangulum Aging stars in the triangle Saturday, November 3, 2012
Halloween Star II A stellar cannibal for Halloween Wednesday, October 31, 2012
Tiny Black Hole A record-setting black hole Friday, October 26, 2012
Star Destroyer A star loses a life-and-death struggle Thursday, October 25, 2012
Gravitational Kick A black hole gets a big kick Wednesday, October 24, 2012
White-Dwarf Planets II Dead stars consume dead planets Wednesday, October 17, 2012
Celestial Equator Splitting the sky in half Monday, October 15, 2012
Moon and Venus Long pauses in long-distance calls Thursday, October 11, 2012
Dark Portrait Snapping a picture of the unseeable Tuesday, October 9, 2012
Faint Triplets A faint set of stellar triplets Sunday, October 7, 2012
More Venus and Regulus A well-timed early morning encounter Tuesday, October 2, 2012
Venus and Regulus Venus chugs past the heart of the lion Monday, October 1, 2012
The Horse’s Nose The flying horse’s bright nose Sunday, September 23, 2012
Hot Jupiters Clearing out a star system Saturday, September 15, 2012
BL Lacertae A star that’s more than a star Friday, September 14, 2012
Gamma Cephei IV Getting messy for science Wednesday, September 5, 2012
Gamma Cephei III Keeping a planet on the table Tuesday, September 4, 2012
Gamma Cephei II A gnat’s eyelash and a distant planet Monday, September 3, 2012
Gamma Cephei The top of the king’s starry house Sunday, September 2, 2012
Contact Binaries III A star system with a lot of variety Friday, August 17, 2012
Contact Binaries II Stirring up the family dynamics Thursday, August 16, 2012
Contact Binaries Stars that can’t let go Wednesday, August 15, 2012
Cygnus X-1 A giant star vanishes from view Wednesday, August 1, 2012
Colorful Beak The swan’s colorful beak Tuesday, July 31, 2012
Zippy Planets Getting a big kick from a black hole Thursday, June 28, 2012
Double Heart Twin black holes in a nearby galaxy Wednesday, May 30, 2012
Hungry Black Hole A black hole that’s snacking on a star Tuesday, May 29, 2012
Black Hole Power Getting power from a black hole Friday, April 20, 2012
Double Sunsets Double sunsets on alien worlds Thursday, April 5, 2012
Snack Time Snack time for a giant black hole Thursday, March 29, 2012
Black Hole Bullets Bullets of hot gas from a black hole Wednesday, March 28, 2012
The Right Angle Taking a bead on the lion’s tail Sunday, March 18, 2012
Comfy Planets Looking for comfy homes for life Sunday, March 4, 2012
Mars Science Laboratory III Protecting Mars from alien invaders Thursday, November 24, 2011
Mikhail Lomonosov The man who discovered an atmosphere Saturday, November 19, 2011
Changing Time Just passing the time Tuesday, October 18, 2011
Robert Trumpler Filling the space between the stars Sunday, October 2, 2011
AMS-2 Looking for antimatter Tuesday, April 19, 2011
Revolutionary Star Looking for a "revolutionary" star Sunday, April 10, 2011
Shortest Year Birthdays by the basketful Sunday, March 13, 2011
Cancer A famous but faint constellation Saturday, March 12, 2011
M87 Black Hole Looking for a hidden giant Thursday, March 10, 2011
Young Black Hole Watching an infant black hole Wednesday, March 9, 2011
Galaxies and Black Holes Insight into a chicken-and-egg problem Tuesday, March 8, 2011
Underground Astronomy IV Searching for dark matter in a dark location Friday, March 4, 2011
Interesting Planets Interesting worlds in other star systems Friday, February 11, 2011
Upsilon Andromedae An out-of-whack solar system Wednesday, February 9, 2011
Defining Planets An uncertain count of planets Tuesday, February 8, 2011
Counting Planets II Keeping score in the search for planets Thursday, January 20, 2011
Counting Planets Adding to the planetary census Wednesday, January 19, 2011
Habitable Zones Looking for worlds with rainy days Tuesday, January 18, 2011
Plurality of Worlds Changing ideas about the universe Monday, January 17, 2011


©2015 The University of Texas McDonald Observatory