The Speed of Gravity
One of the more vexing issues in current science is determining just how fast gravity moves. This is an issue because of the fact that, according to current science, nothing can move faster than light. It is a hard limit on the transfer of informat...
9 gigapixels, 84 million stars: Peer into the world's most...
What you see here is the core of the Milky Way, as seen by the European Space Agency's VISTA telescope. If you looked up at the center of the Milky Way with your naked eye, all of these stars, galaxies and nebulae would occupy a patch of space that's...
Stunning photos taken from 240 miles up in space — Lost...
Wow! As if wasn't mind-bending enough, astronaut Don Pettit used multiple 30-second exposure photos and high tech imaging software to create these from 240 miles above the Earth which reveal the paths taken by star and Earth lights over a 10-15 min...
slightlywarped.com's Amazing Images
A beautiful functional time piece, the Planisphere Watch finds it's roots in astronomy.
Motion in the Heavens: Stars, Sun, Moon, Planets
The purpose of this lecture is just to review the various motions observed in the heavens in the simplest, most straightforward way. We shall ignore for the moment refinements like tiny deviations from simple motion, but return to them later.
Ensign Software - ESPL: Dances of the Planets
Charting Software for stock, futures and forex traders using free Internet data or data feeds from eSignal, InterActive Brokers, IQFeed, DTN and TransAct.
Prague Astronomical Clock - 600th Anniversary Show
Video-mapping show on the Astronomical Clock in Old Town Square that celebrates the 600th anniversary of the construction of the clock.