Tag Archives: space

There has been exponential growth of space objects, including orbital debris that has increased the in-orbit collision risk. NASA estimates there are 21,000 objects orbiting Earth that are larger than 10 cm, 500,000 between 1 and 10 cm, and more than 100 million that are less than 1 cm. Orbital …

Landing on Mars is hard. Two out of three missions to the red planet have failed. Hundreds of things have to go just right during this nail-biting drop. To get there, will have to fly through about 483 million kilometers (300 million miles) of deep space and target a very precise …