If The Moon Were Replaced With Some Of Our Planets
Our moon is a pretty big object. It's big enough to be a respectable planet in its own right, if it were orbiting the sun instead of the Earth. (Actually, it is orbiting the sun in a nearly perfectly circular orbit, that the Earth only slightly perturbs... but that's a topic for another day.) The Moon is a quarter the diameter of the Earth. Only Pluto has a satellite that is larger, in proportion to the size of the planet it orbits.
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[9 Years on Mars]
![[9 Years on Mars]](http://img.gagdaily.com/uploads/posts/edu/2013/short/0000b988_medium.jpg "[9 Years on Mars]")
[NASA's Mars rover Opportunity just celebrated its ninth anniversary on Mars – a mission that was originally meant to last just 90 days...] – The Atlantic. Photo: NASA's rover Opportunity visits Victoria Crater, viewed from orbit by the High Resolution Imaging Science Experiment on NASA's Mars Reconnaissance Orbiter in october of 2006. Opportunity is a small dot on the crater's lip, at top right. Opportunity first reached the crater's rim on September 27, 2006. (Photo by NASA/JPL-Caltech/University of Arizona via The Atlantic)
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«Skylon» Space Plane
[A small British company with a dream of building a re-usable space plane has won an important endorsement from the European Space Agency (ESA) after completing key tests on its novel engine technology. Reaction Engines Ltd believes its Sabre engine, which would operate like a jet engine in the atmosphere and a rocket in space, could displace rockets for space access and transform air travel by bringing any destination on Earth to no more than four hours away]. – Chris Wickham via Reuters. Photo: Artist's impression of Skylon. (Photo by Reaction Engines Ltd)...
The Sun by Alan Friedman
Alan Friedman, sun photographed with a solar telescope using a Hydrogen alpha filter....
Ben Cooper’s by Pics Of Space Shuttle
These rare photos capture the Flight Deck (cockpit) of the Space Shuttle Endeavour, fully powered for one of the final times. Just a few weeks later, at 9:58am EDT on May 11, Endeavour was powered down for the final time in history. It was the last of the three space shuttles to have power. Below, other views show the mid-deck, gutted of its lockers and storage areas, and three final photos show the white room entrance in the Orbiter Processing Facility, signed by thousands over the years....
New 3-D Map of Massive Galaxies and Distant Black Holes Offers Clues to Dark Matter and Dark Energy
[The Sloan Digital Sky Survey III (SDSS-III) has released the largest-ever three-dimensional map of massive galaxies and distant black holes, which will help astronomers explain the mysterious [dark matter] and [dark energy] that scientists know makes up 96 percent of the Universe]. – SDSS-III...
The Biggest Most Long-lasting Saturnian Storm
An incredible view of daytime lightning on Saturn during one of the biggest storms the ringed planet has ever seen has been captured by a NASA spacecraft.
Photo: The huge storm which generated the lightning strike on Saturn can be seen in the top right of this image. (Photo by NASA)...
Orbital Gallery Oleg Kotov
Kamchatka
Oleg Valeriyevich Kotov was born October 27, 1965, in Simferopol, Crimean oblast in Ukrainian SSR. After a career as a physican assigned to space program, he joined the Russian cosmonaut corps. He has flown two long duration spaceflight on the International Space Station logging just short of a year in space. Kotov is currently assigned to the Soyuz TMA-10M/Expedition 37/Expedition 38 long duration spaceflight scheduled for 2013-2014....
Dramatic changes spotted in HD 189733b exoplanet atmosphere
This artists rendering illustrates the evaporation of HD 189733bs atmosphere in response to a powerful eruption from its host star. NASAs Hubble Space Telescope detected the escaping gases and NASAs Swift satellite caught the stellar flare. (Credit: NASAs Goddard Space Flight Center)...
NASA's Kepler Mission Discovers Planet
The newly-discovered gaseous planet Kepler-16b orbits its two stars. NASAs Kepler Mission discoverd the world orbiting two Stars, the larger a K dwarf and the smaller a red dwarf. (Photo by NASA/JPL-Caltech/T. Pyle via Getty Images)...
![Rare [Hybrid] Total Solar Eclipse](http://img.gagdaily.com/uploads/posts/fact/2013/short/00010c55_medium.jpg "Rare [Hybrid] Total Solar Eclipse")
