Top 7 striking facts about time

1. Once a year on Earth lasted 486 days, it was about 800 million years ago, before the birth of ancient life in the era of large-scale glaciation of the Earth. Hundreds of millions of years later, in the era of the dinosaurs, the year was reduced to 370 days. He is now, as you know, is 365 days. What is happening? The facts that the Earth rotates more slowly, because it "slows down" lunar gravity.

Student Engineers Spark Zero-Gravity Fires on Weightless Wild Ride

Gravity, we have defied you. Seven university student teams from across the United States escaped the pull of Earth's gravity — if only for a few seconds — on a NASA microgravity flight to see how fire, liquids and magnets behave in weightlessness.

The students flew with NASA's Microgravity University Program Friday (July 19) aboard a Zero Gravity Corporation Boeing 727 jet modified to fly up and down on a parabolic path to create up to 30 seconds of zero gravity, moon gravity or Martian gravity on the downswing followed by periods of "hypergravity" (twice Earth's pull) on the way back up.

Structures of galaxies Clusters

In the universe Galaxy clusters are huge structures. Galaxies emit a lot of gravity. These causes nearby galaxies attract each other and are merged to form clusters. Our galaxy, the Milky Way, is part of a small cluster called the Local Group . Within a cluster, galaxies rotate around each other, and even frequently collide. The size and mass of the cluster galaxies varies with the form, but the distance between one end and another is always several million light years.