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@nasa : Death Star: The destruction of a planet may sound like the stuff of science fiction, but a team of astronomers has found evidence that this may have happened in an ancient cluster of stars at the edge of the Milky Way galaxy. Using several telescopes, including our Chandra X-ray Observatory, researchers have found evidence that a white dwarf star - the dense core of a star like the sun that has run out of nuclear fuel - may have ripped apart a planet as it came too close. When a star reaches its white dwarf stage, nearly all of the material from the star is packed inside a radius one hundredth that of the original star. This means that, for close encounters, the gravitational pull of the star and the associated tides, caused by the difference in gravity's pull on the near and far side of the planet, are greatly enhanced. For example, the gravity at the surface of a white dwarf is over ten thousand times higher than the gravity at the surface of the Sun. Image Credit: NASA/CXC/IASF Palermo/M.Del Santo et al; NASA/STScI #nasa #space #astronomy #chandra #star #milkyway #galaxy #science
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Aboard the International Space Station, astronaut Terry Virts posted this photo April 3 and simply wrote, Earth.' The space station is a convergence of science, technology and human innovation that enables us to demonstrate new technologies and make research breakthroughs not possible on Earth. It has been continuously occupied since November 2000 and, since then, has been visited by more than 200 people and a variety of international and commercial spacecraft. The @ISS remains the springboard to our next giant leap in exploration, including future missions to an asteroid and Mars. Credit: NASA #iss #nasa #space #space station #astronauts #moon #earth;
Honoring Jackie Robinson: "Honoring #JackieRobinson today! #42" wrote NASA astronaut Terry Virts, wearing a replica Jackie Robinson jersey on orbit in the cupola of the International Space Station. April 15, which was baseball's opening day in 1947, has now come to commemorate Jackie Robinson's memorable career and his place in history as the first black major league baseball player in the modern era. He made history with the Brooklyn Dodgers (now the Los Angeles Dodgers) and he was inducted to the Baseball Hall of Fame in 1962. Image Credit: NASA #nasa #jackierobinson #jackie42 #JackieRobinsonDay #42 #space #iss #spacestation;
And liftoff! A SpaceX Falcon 9 rocket lifts off from Space Launch Complex 40 at Cape Canaveral Air Force Station carrying the Dragon resupply spacecraft on the sixth commercial resupply services mission to @ISS. Liftoff was at 4:10 p.m. EDT, Tuesday, April 14. Research that will help prepare our astronauts and robotic explorers for future missions to Mars is among the two tons of cargo on its way to the International Space Station aboard Dragon. Dragon's cargo will support approximately 40 of the more than 250 science and research investigations that will be performed during Expeditions 43 and 44, including numerous human research investigations for NASA astronaut Scott Kelly's one-year mission in space. Image Credit: NASA/Kim Shiflett #nasa #space #spacex #iss #spacestation #isscargo #launchamerica #falcon9 #dragon #yearinspace;
It's launch day for our International Space Station (@ISS) cargo resupply flight. The weather forecast continue to predict a 60 percent of favorable conditions for today's launch. Liftoff of the SpaceX Falcon 9 rocket and Dragon spacecraft is targeted for 4:33 p.m. EDT from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. The Dragon spacecraft will be filled with more than 4,300 pounds of supplies and payloads, including critical materials to directly support about 40 of the more than 250 science and research investigations that will occur during Expeditions 43 and 44. Science payloads will study new ways to possibly counteract the microgravity-induced cell damage seen during spaceflight, the effects of microgravity on the most common cells in bones, gather new insight that could lead to treatments for osteoporosis and muscle wasting conditions, continue studies into astronaut vision changes and test a new material that could one day be used as a synthetic muscle for robotics explorers of the future. Also making the trip will be a new espresso machine for space station crews. After five weeks at the space station, the spacecraft will return with more than 3,000 pounds of cargo, including crew supplies, hardware and computer resources, science experiments, space station hardware, and trash. Image Credit: NASA #nasa #iss #isscargo #space #spacestation #spacex #launch #science #technology;
Many of Hubble's most iconic images reveal majestic nebulae in the nearby universe. These observations advance our understanding of how gas and dust come together to form nebulae, and how these nebulae become the sites for newborn star and planetary systems. Ken Carpenter, Hubble Operations Project Scientist, talks about his favorite Hubble image of the Carina Nebula. #Hubble25;

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