justinsetchell

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Physicist suggests speed of light might be slower than thought

(Phys.org) —Physicist James Franson of the University of Maryland, Baltimore County has captured the attention of the physics community by posting an …

Stanley Miller’s lost samples hint at ‘spark’ of life

In 1953, chemist Stanley Miller published a landmark experiment showing how some of the molecules of life could have formed on a young Earth.<p>Miller, …

Georgia Tech

Road to Mars: JPL scientists prepare for a supersonic test over Hawaii

If the wind blows the right way, sometime around sunset on Friday night, three tractor tugboats operated by P&R Water Taxi will pull up anchor in Honolulu and set off for the aquamarine waters west of Kauai.<p>On Saturday, assuming all goes well, these vessels will collect the sodden remains of a …

Space Thief Or Hero? One Man's Quest To Reawaken An Old Friend

More than 30 years ago, Robert Farquhar stole a spacecraft.<p>Now he's trying to give it back.<p>The green satellite, covered with solar panels, is hurtling back toward the general vicinity of Earth, after nearly three decades of traveling in a large, looping orbit around the sun.<p>If Farquhar, a former …

Elon Musk Is About To Launch The Heaviest Rocket In Existence — And Yes, It Can Reach Mars

Put another way, this one ship has the liftoff thrust equivalent of <i>15</i> Boeing 747s tied together and running at full power.<p>Only one other rocket has been heavier than the Falcon Heavy will be, SpaceX claims. That was NASA's Saturn V ship, which carried the Apollo and Skylab missions into space from …

Going Up: Could Partial Space Elevators Take Us Into Space?

A proposed partial space elevator would not be anchored to Earth.<p>A trip to the moon on gossamer strings? A "partial" space elevator that could carry satellites to geosynchronous orbit might be just the ticket. (See also: "Escaping Earth: Could a Space Elevator Work?")<p>A space elevator untethered to …

How you can change the past

Time's arrow and Boltzmann's entropy

The <b>arrow of time</b> expresses the fact that in the world about us the past is distinctly different from the future. Milk spills but doesn't unspill; …