The International Space Station. Credit: NASA
Monday, March 2, 2015
Sunday, March 1, 2015
UNITED NATIONS DECLARED 2015 TO BE THE YEAR OF LIGHT
The year of 2015 has been declared the International Year of Light (IYL) by the United Nations.
Organizations, institutions, and individuals involved in the science and applications of light will be joining together for this yearlong celebration to help spread the word about the wonders of light. NASA’s Chandra X-ray Observatory explores the universe in X-rays, a high-energy form of light. By studying X-ray data and comparing them with observations in other types of light, scientists can develop a better understanding of objects likes stars and galaxies that generate temperatures of millions of degrees and produce X-rays.
To recognize the start of IYL, the Chandra X-ray Center is releasing a set of images that combine data from telescopes tuned to different wavelengths of light. From a distant galaxy to the relatively nearby debris field of an exploded star, these images demonstrate the myriad ways that information about the universe is communicated to us through light. In this image, an expanding shell of debris called SNR 0519-69.0 is left behind after a massive star exploded in the Large Magellanic Cloud, a satellite galaxy to the Milky Way. Multimillion degree gas is seen in X-rays from Chandra, in blue. The outer edge of the explosion (red) and stars in the field of view are seen in visible light from the Hubble Space Telescope. Chandra Celebrates the International Year of Light. Image Credit: NASA-CXC-SAO.
Saturday, February 28, 2015
Friday, February 27, 2015
Thursday, February 26, 2015
Wednesday, February 25, 2015
Tuesday, February 24, 2015
Monday, February 23, 2015
Sunday, February 22, 2015
COMET C/2014 Q2 KNOWN AS LOVEJOY
Comet C/2014 Q2 (Lovejoy) is one of more than 32 comets imaged by NASA's NEOWISE mission from December 2013 to December 2014. This image of comet Lovejoy combines a series of observations made in November 2013, when comet Lovejoy was 1.7 astronomical units from the sun. (An astronomical unit is the distance between Earth and the sun.) The image spans half of one degree. It shows the comet moving in a mostly west and slightly south direction. (North is 26 degrees to the right of up in the image, and west is 26 degrees downward from directly right.) The red color is caused by the strong signal in the NEOWISE 4.6-micron wavelength detector, owing to a combination of gas and dust in the comet's coma. Comet Lovejoy is the brightest comet in Earth's sky in early 2015. Image credit: NASA/JPL-Caltech.
Saturday, February 21, 2015
Friday, February 20, 2015
Thursday, February 19, 2015
Tuesday, February 17, 2015
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