He called this hypothetical world "Planet X." "In some ways, Pluto's more of a planet than some of the other established planets, like Mercury." ...

The distance from Earth to Pluto is 4.67 billion miles. The average passenger aircraft travels at 575 miles per hour. That means it would take more than 8 million hours to reach the planet ...

Earth is our home planet, and it's the only place in the ... Marilyn Perkins is the content manager at Live Science. She is a science writer and illustrator based in Los Angeles, California.

On July 14, 2015, the New Horizons spacecraft, one of the most advanced ever built, is scheduled to fly by Pluto to take the very first detailed images of the dwarf planet. After nine years and 3 ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

While a quick trip to Pluto would be a technological milestone, the fastest man-made object ever, NASA’s Parker Solar Probe, can only travel about 400,000 miles per hour, or 0.06% the speed of ...

For more than 70 years, Pluto was classed ... speculated that only a massive planet's gravitational pull could explain these "orbital anomalies", said Live Science. Then in February, scientists ...