Astronaut Scott Kelly Speaks at Shuttle Enterprise Dedication Ceremony

NASA astronaut Scott Kelly delivers remarks from onboard the International Space Station during the Space Shuttle Enterprise dedication ceremony Monday, April 27, 2015, at the Intrepid Sea, Air & Space Museum in New York City. Enterprise was dedicated to the fallen crews who gave their lives in pursuit of space exploration. via NASA http://ift.tt/1JOwG4D

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Unmasking the Secrets of Mercury

To learn more about the minerals and surface processes on Mercury, instruments aboard NASA’s MESSENGER spacecraft have been collecting surface measurements since MESSENGER entered Mercury orbit on March 17, 2011. via NASA http://ift.tt/1zeU37k

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April 25, 1990, Deployment of the Hubble Space Telescope

In this April 25, 1990, photograph taken by the crew of the STS-31 space shuttle mission, the Hubble Space Telescope is suspended above shuttle Discovery’s cargo bay some 332 nautical miles above Earth. via NASA http://ift.tt/1DHC056

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Celestial Fireworks

The brilliant tapestry of young stars flaring to life resemble a glittering fireworks display in the 25th anniversary NASA Hubble Space Telescope image, released to commemorate a quarter century of exploring the solar system and beyond since its launch on April 24, 1990. via NASA http://ift.tt/1HqPKbC

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NASA Tail Technology Could Someday Reduce Airplane Fuel Use

In this photo taken from a chase plane, the Boeing ecoDemonstrator 757 flight test airplane –with NASA’s Active Flow Control technology installed on the tail — makes a final approach to King County Boeing Field in Seattle, Washington. via NASA http://ift.tt/1OGdlnA

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A Sky View of Earth From Suomi NPP

This 15,000-by-15,000-pixel image of southern Africa and the surrounding oceans took six orbits of the Suomi NPP spacecraft to compile. via NASA http://ift.tt/1aPhuIp

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Teachers’ Unions Reasserting Themselves With Push Against Standardized Testing by KATE TAYLOR and MOTOKO RICH

By KATE TAYLOR and MOTOKO RICH

Often painted as obstacles to improving schools, the unions now find common ground with conservative leaders and education reform advocates.

Published: April 21, 2015 at 12:00AM

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