Declassified U.S. military specifications UFO

National documentation of the United States for the first time published the secret blueprints flying saucer, which was developed in the 1950s for the U.S. Air Force. The device is called Project 1794 (the "Project 1794").

According to the posting of the document dated June 1, 1956, a UFO was designed for vertical takeoff and landing and had a speed of three to four Mach numbers (from 3200 to 4300 kilometers per hour). Altitude flying saucers - over 30 kilometers, and the maximum range - about 1800 kilometers.

Planetary Nebula Abell 39

Let's look at a planetary nebula nearly perfect spherical shape, whose name Abell 39 (Abell 39).

Today in our galaxy "Milky Way" is known more than 1500 planetary nebulae that are astronomical substance consisting of ionized gas shell and the central star - a white dwarf. Planetary nebulae are fast in astronomical terms the phenomenon, which lasts only a few tens of thousands of years. For comparison, the life of the parent star is a few billion years.

The universe is increasing, what threats the Earth

NASA Jet Propulsion Laboratory reported that the astronomers who work with the Space Telescope, "Spitzer", were able to conduct a more accurate calculation of the rate of increase in the history of astronomy. In other words, this swiftness is called the Hubble constant.

We live on a small planet Earth, but this does not preclude our interest in the rest of the world. But to know the size of this huge, compared to us, the world, to find out what the age and expansion rate of the universe has. More recently, you can also add the concept of "acceleration of the expansion." But the accelerated expansion of the universe, you can still stick to the linear Hubble law.