HOW MANY SATELLITES CAN WE SAFELY FIT IN EARTH ORBIT? - Experts have been sounding alarm bells for years that Earth orbit is getting a bit too crowded. So how many satellites can we actually launch to space before it gets to be too much? Read article SCIENTISTS RACE TO MAP DANGEROUS ULTRASMALL SPACE JUNK - An ambitious U.S. government program is working to detect and track millions of tiny space j