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Stars and other Celestial Stellar objects

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Eugene Cernan, last man on the moon, dies. The retired United States Navy captain was 82. His family confirmed the news in a statement Monday, saying he died following "ongoing health issues. " "Our family is heartbroken, of course, and we truly appreciate everyone's thoughts and prayers. Gene, as he was known by so many, was a loving husband, father, grandfather, brother and friend," the family said. Cernan's death comes a little more than a month after fellow astronaut John Glenn died in December. Up until his death he was passionate about space exploration and hoped America's leaders would not let him remain the last man to walk on the Moon, his family said. In his last conversation with NASA Administrator Charles Bolden, Cernan spoke of his "lingering desire" to inspire America's youth to study science, technology, engineering and mathematics "and to dare to dream and explore," NASA said.

"Gene's footprints remain on the moon, and his achievements are imprinted in our hearts and memories," Bolden said. "Your Popie went to Heaven. What It Looks Like To Leave Our Solar System At The Speed Of Light. Time-Lapse Videos. This clickable map organizes all of the existing time-lapse sequences into geographical regions. These videos are organized to both aid in searching for a desired area of the Earth, and to break down the volume of the existing time-lapse sequences. Each region below is separated by regions around the world, as well as links below the clickable map to the "Aurora Borealis and Australis" and "Special Videos". The newest release of time-lapse sequences will be posted just below these two sections.

Latest videos from the crew Over Asia at Night This video was taken by the Expedition 46 crew on board the International Space Station. Date posted: 2016/05/11 Sunglint over the Ocean This video was taken by the Expedition 47 crew on board the International Space Station. Blue Moon Stories: "Once in a blue moon... " means seldom or absurd. But, believe it or not, sometimes the moon really does turn blue, usually after volcanic eruptions or major forest fires. Volcanoes and wildfires fill the air with ash and dust. If the airborne particles are just the right size--about 1 micron (one millionth of a meter) wide--they act like a color-filter, tinging the moon blue.

Clouds of water droplets, ice crystals or fine-grained sand can do the same thing. There are other reasons for odd-looking moons, notes atmospheric optics expert Les Cowley. Have you ever seen a blue-colored moon? From Tom King of Watauga, Texas: "I had never paid any real attention to the term 'Blue Moon' until a recent October evening. "On a similar night a little more than two weeks later, October 30th, I again caught the 'Blue Moon' with my camera, this time with even more vivid coloring: "The moon was quite striking on these two October evenings. From Robin Scagell in Australia: "I have seen a real blue Moon.

What Is a Blue Moon? A blue moon is full moon that occurs as the second full moon in a given month. Blue moons are not typically blue in color — that happens only, well, once in a blue moon, but there is the possibility for a hint of blue in any full moon (more on this below). The definition of blue moon as the term is used today began when a writer made a mistake. [Blue Moon Lights Up Night Sky This Week] See photos of the August 2012 blue moon here: The Blue Moon and Full Moon of 2012 (Photos) The phrase "blue moon" is "a creature of folklore," explains Philip Hiscock, a folklorist at the Memorial University of Newfoundland.

"It's the second full moon in a calendar month. " Hiscock helped figure out where the term came from. Hiscock and Texas astronomer Donald W. The next blue moon, according to this folklore, will be July 31, 2015, following a full moon on July 1, 2015. But can the moon really be blue? The phrase “once in a blue moon” — meaning something very rare — dates back to 1824. — Staff. Wayward satellites repurposed to test general relativity. ESA/J.Huart An artist's conception of one of the Galileo GPS satellites. Two satellites that were accidentally launched into the wrong orbit will be repurposed to make the most stringent test to date of a prediction made by Albert Einstein’s general theory of relativity — that clocks run more slowly the closer they are to heavy objects. The satellites, operated by the European Space Agency (ESA), were mislaunched last year by a Russian Soyuz rocket that put them into elliptical, rather than circular, orbits.

This left them unfit for their intended use as part of a European global-navigation system called Galileo. But the two crafts still have atomic clocks on board. On 9 November, ESA announced that teams at Germany's Center of Applied Space Technology and Microgravity (ZARM) in Bremen and the department of Time–Space Reference Systems at the Paris Observatory will now track this rise and fall. Volcanic rock hints at source of Earth’s water. Arctic-Images/Corbis Lava from Earth's mantle has given scientists clues about the origin of the planet's water. The origin of Earth’s water has puzzled scientists for decades. Icy comets smashing into the planet seemed like natural donors, but many comets have water chemistry different from that of Earth’s oceans. Rocky asteroids that contain water might have soaked the young planet, but analyses of meteorites — the asteroids’ remnants on Earth — show that the planet today is missing the material that those impacts should have left behind.

Research published today in Science1 provide evidence for a different theory: that water has been around since the Earth formed, trapped on grains of dust that aggregated to make a planet. Earth is like an avocado, says Steve Mojzsis, a geologist at the University of Colorado Boulder. The mystery deepens Hot but wet This could be due to water sticking to dust grains in the swirling disk of the early Solar System, the paper suggests. Jupiter's Icy Moon Europa: Best Bet for Alien Life? WASHINGTON — Jupiter's moon Europa doesn't look like a particularly inviting place for life to thrive; the icy satellite is nearly 500 million miles (800 million kilometers) from the sun, on average. But beneath its icy crust lies a liquid ocean with more water than Earth contains. This ocean is shielded from harmful radiation, making Europa one of the solar system's best bets to host alien life.

That's one of the reasons Europa is so alluring to scientists. It has all the elements thought to be key for the origin of life: water, energy, and organic chemicals, the carbon-containing building blocks of life, scientists said at an event called "The Lure of Europa," held here last month. [Europa and Its Underground Ocean (Video)] "All the ingredients are there to make us think Europa is the next place to go," NASA Chief Scientist Ellen Stofan said at the event, which was organized by the Planetary Society, a nonprofit organization headed by scientist and TV host Bill Nye. Looking for life. Airglow Formation. Captures of elusive red sprites from ISS. Lightning sprite, or red sprite, above a thunderstorm in northwest Mexico. The sprite was 2,200 kilometers (1,400 miles) away, high over Missouri or Illinois. The lights of Dallas, Texas appear in the foreground. The sprite shoots up to the greenish airglow layer, near a rising moon. Image acquired from International Space Station, August 10, 2015.

You’ve seen lightning shoot from the bottom of a cloud during powerful thunderstorms. Here’s a closer view: Two minutes and 58 seconds later after the first photo on this page was taken, as the ISS was over the coastal Mexican resort of Acapulco, the crew documented another red sprite (see below) over a brilliant white thundercloud and lightning discharge near the coast of El Salvador. The shorter distance to the storm — about 1,150 km (710 miles) — makes it somewhat easier to see details of the sprite. Red sprite above a thunderstorm near the coast of El Salvador. Why are sprites so elusive?

Via NASA Earth Observatory. Cygnus. In Greek mythology there are four characters known as Cycnus or Cygnus, listed on this Wikipedia webpage. The words Cygnus and cygnet, a young swan, are from Latin cygnus, 'swan', Greek kuknos. The English word swan comes from the Indo-European root *swen- 'To sound'. Derivatives: swan¹ (from Old English swan), sone (a subjective unit of loudness, as perceived by a person with normal hearing), resonate, sonic, sonnet, sound¹, unison, (these words from Latin sonus), sonar, sonant (voiced, as a speech sound), sonata, sonorous, assonance, consonant, dissonant, resound, (these words from Latin sonare, to sound). [Pokorny swen- 1046.

Watkins]. The trumpeter swan's call has been likened to the sonorous notes of a French horn. “But in some cases, with incorrect usage and improperly, a sound is called a 'voice,' as for example "the voice of the trumpet bellowed," and (Vergil, Aen. 3-556): ... and voices broken on the shore. In the myth concerning Cycnus the friend of Phaeton, it was said; Eltanin and Rastaban are the Dragon's Eyes | Brightest Stars. Our human eyes and brains tend to pick out pairs of stars on the dome of night, especially if the two stars are relatively bright. Few such couplings represent true partner stars in space, however; rarely are the two stars gravitationally bound.

Some well-known stellar pairs that are not truly bound include the two stars of the constellation Gemini the Twins – Castor and Pollux – as well as the Little Dipper’s bowl stars Kochab and Pherkad. On Northern Hemisphere summer nights, another famous pair of stars glares down at us from up high in the northern sky. These stars are Eltanin and Rastaban. They represent the fiery Eyes of the constellation Draco the Dragon. Like many pairs of stars, these two look close together only because they are aligned on nearly the same line of sight, as seen from Earth. How to spot Eltanin and Rastaban Science and history of the Dragon’s Eyes Eltanin and Rastaban mark the head of Draco the Dragon.

How to spot Eltanin and Rastaban. Constellations & Ancient Civilizations.