Convert 50 Kilometers per Hour to Miles per Hour

200 km/hour

31.07 mph

62.137 mph

40.39 mph

Convert 60 Kilometers per Hour to Miles per Hour

45 km/hMaximum, Running

The human frame is built to handle running speeds up to 40 miles per hour, scientists say. The only limiting factor is not how much brute force is required to push off the ground as previously thought, but how fast our muscle fibers can contract to ramp up that force.

A 2016 paper by Ryuta Kinugasa and Yoshiyuki Usami noted that the Guinness World Record for a human running 100 meters on all fours has improved from 18.58 seconds in 2008 (the first year the record was tracked) to 15.71 seconds in 2015.

A spacecraft leaving the surface of Earth, for example, needs to be going about 11 kilometers (7 miles) per second, or over 40,000 kilometers per hour (25,000 miles per hour), to enter orbit. Achieving escape velocity is one of the biggest challenges facing space travel.

00006 the speed of light. So if it takes a photon moving at the speed 1 year to travel a light year, the voyager spacecraft moving at . 00006 the speed of light would take 1/. 00006 years to travel a light year, or more accurately, 16,666.6666667 years.

The spacecraft has a plutonium power supply that boasts an 88-year half life, meaning we’ll stay in touch for years. “It’s a very simple, long-lived source of energy, but eventually it will run out,” Stone says.

22 billion km

Voyager 1, which is zipping along at 38,000 mph (61,000 km/h), is currently 11.7 billion miles (18.8 billion kilometers) from Earth. Voyager 2 took a different route through the solar system and is now 9.5 billion miles (15.3 billion km) from home.

‘Oumuamua is currently moving away from Earth at nearly twice the speed of Voyager 1, the fastest spacecraft ever built. The asteroid travels about 500 million miles per year—the average distance between the Earth and Jupiter—which means it will enter interstellar space sometime in the late 2030s.

As the first known object of its type, ʻOumuamua presented a unique case for the International Astronomical Union, which assigns designations for astronomical objects. Originally classified as comet C/2017 U1, it was later reclassified as asteroid A/2017 U1 due to the absence of a coma.