US Army's Laser Gun Can Blast Enemy Drones: How It Works
US Army's Laser Gun Can Blast Enemy Drones: How It Works
Free Mars Exploration Rover 10-Year Anniversary Event Tonight
The public is invited to share, either in person or online, in a 10-year anniversary event for the Mars Exploration Rovers (MER), Spirit and Opportunity, tonight at 7 p.m. PST (10 p.m. EST). The event, hosted by NASA's Jet Propulsion Laboratory, Pasadena, Calif., is being held in the Beckman Auditorium on the California Institute of Technology campus, 1200 E. California Blvd., Pasadena. Admission is free and is on a first-come, first-served basis.
NASA's twin rovers launched separately in 2003 and landed three weeks apart in January 2004. They completed their three-month prime missions in April 2004 and went on to perform extended missions for years. Spirit and Opportunity made important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life. Although Spirit ceased communicating with Earth in March 2010, the Opportunity rover continues its work on the Red Planet.
NASA's twin rovers launched separately in 2003 and landed three weeks apart in January 2004. They completed their three-month prime missions in April 2004 and went on to perform extended missions for years. Spirit and Opportunity made important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life. Although Spirit ceased communicating with Earth in March 2010, the Opportunity rover continues its work on the Red Planet.
F-22 Raptor
The F-22 is probably the best known fighter-jet in the world and its fame and reliability means that it comes at a pretty high price tag. At just over $211 million it’s the most expensive fighter jet in the world, but that hasn’t put the US army off – they have a fleet of 188 F-22s at a total cost of $79.2 billion.
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