How to watch a shuttle launch
Some advice on how to watch the last shuttle launch.
It’s worth it, believe me.
Tag: engineering
New Texas Giant roller-coaster
An evening pause: Let’s take a ride on a new roller coaster.
Want to send a probe to another planet? Cut costs!
Want to send a probe to another planet? Do it cheaply, as these scientists did.
the cost of solar energy is crashing down
The cost of solar energy is plummeting.
Though it can’t work in many places in the world and therefore can’t completely replace the electrical grid, this is still good news.
Cockpit view of 747 takeoff
An evening pause: Note how long it takes for the 747 to get off the ground. The plane is big and heavy.
Cassini directly samples the plumes from Enceladus and finds an ocean-like Spray
Cassini has directly sampled the plumes from Enceladus and discovered a salty ocean-like spray.
The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. The icy particles hit the detector target at speeds between 15,000 and 39,000 mph (23,000 and 63,000 kilometers per hour), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.
The data suggest a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.
Branson says Virgin Galactic will fly a suborbital flight within a year
From Clark Lindsey: Branson says Virgin Galactic will fly a suborbital flight within a year.
ATV burns up, Progress launched
Busy day for travel to and from ISS: The European unmanned ATV freighter Johannes Kepler burned up in the atmosphere even as a Russian Progress freighter was launched.
In related news, the U.S. and ESA are in negotiations to merge the European unmanned ATV freighter program with NASA’s manned Orion derivative. At the same time, Europe has announced its plans to test fly a reusable space plane.
The first Soyuz launch from French Guiana is set for October 20, 2011
The first Soyuz launch from French Guiana has now been scheduled for October 20, 2011.
Energia not to produce Soyuz spaceship for space tourists
According to the chief of the Russian space agency, it presently does not have the capacity to produce additional Soyuz capsule for tourist flights.
The cost of rare earth metals has soared as China limits supplies
The cost of rare earth metals used in electronics has soared to record levels in the past two weeks as China clamps down on illegal mining and limits supplies.
Unmanned sail prototype prepares for launch
A prototype of an unmanned sailing ship will begin a test voyage this fall.
Although Harbor Wing will operate without a captain and crew by sailing on a pre-programmed course, “the man is always in the loop,” Ott said. An operator, seated at a computer that could be hundreds of miles away, can control the craft with keystrokes that relay commands via satellite. The transmission gap, from order to receipt, is only 18 seconds, which “on the open ocean is not much,” he said, “so you have very close control.”