Earth and Mars Converge

By the time you finish reading this sentence, you’ll be 30 miles (50 kilometers) closer to the Red Planet. Earth and Mars are converging at 22,000 miles per hour (10 kilometers per second) as the pair head for a close encounter next month. On June 21st Mars will lie just 42.3 million miles (68 million kilometers) from Earth — the nearest it’s been in a dozen years.