Neil Armstrong may have been the first person to walk on the moon, but he wasn't the only astronaut on the Apollo 11 mission; someone had to stay on-board the ship. Courtesy of Seeker Stories.

In 1983, scientists observed a mysterious planet-sized object at the edge of our solar system. Was it the long sought-for Planet X?

Nasa Expedition 30 crew around-the-world video of earth from The International puwang station

In this video, You will learn basic and wonders of astronomy.

How scary this must have been!