Latest articles by Leonard David
Mars Rover Opportunity Survives Harsh Martian Winter to Rove Again
Opportunity spent more than four months at its overwintering site.
How Telerobotics Could Help Humanity Explore Space
Humans don't have to land on another planet to explore it.
Secret Air Force X-37B Space Plane Mission a 'Spectacular Success'
The second unmanned X-37B space plane has spent nearly 430 days in orbit … and counting.
Secretive Blue Origin Reveals New Details of Spacecraft Plans
The private space company is making progress testing its prototype manned space capsule.
SETI Telescope to Help US Air Force Track Space Junk
SETI's Allen Telescope array will help track orbital debris
Is Asteroid Mining Possible? Study Says Yes, for $2.6 Billion
The new company Planetary Resources wants to mine asteroids riches. Can it really be done?
Spaceport America Milestones: Record Rocket Launch, Runway Add-On
Virgin Galactic will launch its space-tourism flights from the New Mexico facility.
Proposed Satellite Would Beam Solar Power to Earth
A concept highlights a potentially practical way to harness the energy of the sun.
How Huffing and Puffing Could Remove Space Junk
Focused pulses of atmospheric gases could be fired into the path of space trash.
Boeing's New Crew-Carrying Spaceship Taking Shape
The CST-100 capsule could be ready to carry astronauts by 2015.
Flowing Water on Mars? Strange Red Planet Features Stir Debate
Experts are divided over features on Mars called Recurring Slope Lineae
How Water on the Moon Could Fuel Space Exploration
Permanently shadowed craters near the moon's poles likely hold vast stores of water ice.
Next-Generation GPS Satellites Designed in Virtual Reality
Move over iPad 3, it's time to say hello to GPS 3 satellites.
Scientists Vow to Fight Cuts in NASA's Planetary Science
Space scientists urge the public to fight cutbacks to Mars and planetary science missions.
Hefty Asteroid 2011 AG5's Threat to Earth Should Be Studied More, Scientists Say
Scientists advocate conducting more extensive studies of Asteroid 2011 AG5.
Air Force's Mysterious X-37B Space Plane Survives 1 Year in Orbit
Mystery still surrounds the secretive mission of the U.S. Air Force's second robotic X-37B space plane.
Japan Eyes New Space Mission to Sample an Asteroid
The Hayabusa 2 mission would launch in 2014 and return asteroid samples to Earth by 2020.
Big Asteroid 2011 AG5 Could Pose Threat to Earth in 2040
There's a small chance the big space rock could hit Earth in 2040.
Air Force Eyes Nuclear Reactors, Beamed Power for Spacecraft
Small nuclear reactors and space-to-space solar power beaming stations could be vital for Air Force needs through 2026.
NASA Eyes Plan for Deep-Space Outpost Near the Moon
An outpost near the lunar far side could enable robotic exploration of the moon.
Private Rocket Launch Tests Supersonic Parachute, Reusable Spaceship Tech
The STIG A-3 rocket flight was designed to test steerable balloon parachutes and other technologies.
Virgin Galactic's Private Spaceship Ramping Up Toward Passenger Flights
Powered test flights should occur this summer.
Asteroid Threat to Earth Sparks Global 'NEOShield' Project
Scientists from many nations are discussing how best to battle the asteroid menace.
