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05 May 2015, 11:02 PM ET
Most of the stars in the universe are main sequence stars. The sun is a main sequence star.
05 May 2015, 07:42 PM ET
Sunspot AR2339 unleashed an X2.7 solar flare on May 5th, 2015. A radio blackout alert was issued for areas over the Pacific Ocean by NASA/NOAA. NASA's Solar Dynamics Observatory (SDO) captured the fireworks in multiple wavelengths.
05 May 2015, 04:21 PM ET
A cosmic record has been broken: The most distant galaxy ever measured is 13.1 billion light-years away from Earth, making it one of the earliest galaxies to ever form in the universe.
05 May 2015, 02:48 PM ET
SpaceX's Dragon astronaut taxi will blast off with a dummy on board Wednesday (May 6) in a crucial safety test, and you can watch all of the action live here at Space.com.
05 May 2015, 02:39 PM ET
Researchers using the Chandra X-ray telescope have discovered a group of black holes consuming massive amounts of matter. The black holes are surround by 'thick-disk' quasars that are 5 to 10 percent more efficient in devouring matter.
05 May 2015, 01:57 PM ET
Before astronaut Alan Shepard lifted off to become the first U.S. astronaut in space 54 years ago, three pad abort tests ensured his Mercury capsule could pull away from his Redstone rocket in an emergency. See how SpaceX is building on that history.
05 May 2015, 12:30 PM ET
The Eta Aquarid meteor shower, produced by debris from Halley's Comet, will peak tonight. Find out where you can see the show, as well as a live webcast hosted by the Slooh observatory.
05 May 2015, 11:50 AM ET
The annual Eta Aquarid meteor shower will peak overnight tonight, May 5-6. The online Slooh community observatory will host a live webcast. Here's how to watch it live.
05 May 2015, 11:25 AM ET
The Eta Aquarids are a meteor shower best visible from the Southern Hemisphere.
05 May 2015, 11:00 AM ET
This amazing image of the Northern Lights was a lucky shot for astrophotographer Manish Mamtani. Mamtani took the image from Long Lake Recreation Area in Wisconsin on Match 17, 2015.
05 May 2015, 10:07 AM ET
The sound was recorded by a UNC Chapel Hill payload aboard a high altitude balloon. The balloon was commissioned by Louisiana State University's High Altitude Student Platform (HASP) program and flew to an altitude of ~22 miles in 2014.
05 May 2015, 09:01 AM ET
Space exploration experts and enthusiasts descend on Washington, D.C. this week for the Humans to Mars Summit 2015, a conference that showcases the latest concepts and ideas for manned missions to Mars.
05 May 2015, 07:37 AM ET
Researchers found that temperatures on the "super Earth" exoplanet 55 Cancri e varied by nearly a factor of three between 2011 and 2013. One possible explanation for this huge variability is massive volcanism, astronomers said.
05 May 2015, 07:00 AM ET
The new image was snapped from the deck of the drone ship on April 14, a second or so before the rocket stage toppled over and exploded in a dramatic demise that SpaceX captured on video.
05 May 2015, 07:00 AM ET
A new photo captured by NASA's Mars rover Opportunity shows a rocky spire in a shallow crater on the Red Planet. The mosaic combines images taken by Opportunity's panoramic camera on March 29 and March 30.
04 May 2015, 09:32 PM ET
The century-old outburst from a classical nova is still going strong and surprising astronomers with its steady temperature.
04 May 2015, 04:42 PM ET
Mice zapped with cosmic rays can incur brain damage, suggesting that astronauts' mental performance could suffer over time on deep-space missions to Mars and beyond, researchers say.
04 May 2015, 03:55 PM ET
NASA has successfully tested electromagnetic propulsion in a hard vacuum for the first time.
04 May 2015, 03:50 PM ET
The Space Exploration, Development, and Settlement Act of 2015, drafted by Rep. Dana Rohrabacher (R-Calif.), would mark the second time in the last three decades that Congress has directed NASA to support efforts for human settlements beyond Earth orbit.
04 May 2015, 03:29 PM ET
Sparks flew on Capitol Hill where a NASA authorization bill that recommends deep cuts for Earth science made it out of a sharply divided committee on a party line vote.
04 May 2015, 03:24 PM ET
Dragon is scheduled to lift off at 7 a.m. EDT Wednesday from Florida's Cape Canaveral Air Force Station to see how the capsule performs in the event of a problem during launch. You can watch the unmanned test live here on Space.com.
04 May 2015, 02:00 PM ET
'Star Trek' actress Grace Lee Whitney — who played Janice Rand, yeoman to Captain Kirk — has died at age 85.
04 May 2015, 01:31 PM ET
The creator of the Ansari Xprize winning SpaceShipOne shares how a couple of bicycle shop owners (Wright Brothers) inspired Space exploration, and how the Apollo program inspired private space sector growth.
04 May 2015, 12:47 PM ET
An awesome WIRED video smashes a giant LEGO Super Star Destroyer to bits in a slow-motion video, and actor Tim Russ of Star Trek: Voyager explains 'Star Wars' for May the Fourth.
04 May 2015, 10:46 AM ET
Space: the final frontier — for coffee. Italian astronaut Samantha Cristoforetti, dressed in a 'Star Trek' captain's uniform, became the first person in space to sip from a freshly-brewed cup of coffee, using the ISS's new espresso machine.
04 May 2015, 10:28 AM ET
NASA's Solar Dynamics Observatory (SDO) captured the evolution of the so called ‘Phoenix Prominence’ over a 6 hour period on April 21st, 2015 in several extreme ultraviolet wavelengths.
04 May 2015, 09:51 AM ET
Astrophotographer John Chumack (galacticimages.com) captured 2 hours and 40 minutes of northern lights images in March 2015, and time-lapsed them into 3 minutes of geomagnetic amazement.
04 May 2015, 09:44 AM ET
When Charles Limoli and colleagues exposed mice to a single beam of extremely concentrated radiation, the rodents’ brain cells’ dendrite became damaged.
04 May 2015, 07:13 AM ET
Ropes of hot material that twist and writhe on the surface of the sun appear in unprecedented detail thanks to new observations.
04 May 2015, 07:00 AM ET
Two ringlike structures of stars wrapping around the Milky Way's outer disk now appear to belong to the disk itself. The results show that the disk is actually rippled and about 60 percent larger than previously thought.
04 May 2015, 07:00 AM ET
At a panel discussion Thursday (April 30) at New York's Intrepid Sea, Air & Space Museum, scientists discussed how much Hubble has allowed humans to see, and the possibilities for the telescopes' successor, scheduled to launch in 2018.
03 May 2015, 10:31 AM ET
A Russian cargo vessel suffered a serious malfunction on its way to the space station, NASA's MESSENGER probe slammed into Mercury and the New Horizons spacecraft snapped the best-ever photos of Pluto. Here's a look at Space.com's top stories of the week.
02 May 2015, 02:21 PM ET
From a spacecraft spinning out of control to predicting a cosmic demise, don't miss these amazing space images of the week for May 3, 2015.
02 May 2015, 02:51 AM ET
The principles of rockets go back thousands of years, from powering whimsical toys to lifting humans into space.
01 May 2015, 03:56 PM ET
Since splashing down after a history-making test flight in 2014, NASA's first Orion space capsule has been, for the most part, out of sight. Now, an auction benefiting students is offering the chance to go behind-the-scenes and see the Orion spacecraft up
01 May 2015, 03:07 PM ET
The private spaceflight company SpaceX will launch a pad abort test on May 6, 2015 to test the launch escape system on its manned Dragon spaceship. See the mission in photos here.