Upconversion process of NaYF4 Nano Crystals Doped with Ytterbium and Erbium

Hydrogen, gravity and time is all it takes to create a star. See this amazing process in action.

If a star strays too close to a black hole, it is doomed. This NASA simulation shows what happens A black hole has an immensely powerful gravitational pull, and if a star wanders too close it can be torn apart. This video from NASA's Goddard Space Flight Center and CI Lab simulates the star's destruction. As the star approaches, it gets shredded and its remnants become a disc of hot material spinning around the black hole. The innermost part of the disc blasts out X-ray radiation

Watch what happens when two Black holes collides It sounds extreme but it probably does happen. This video shows two black holes spiralling ever closer together until they eventually crash into each other

This 3-D visualization flies across a small portion of the Veil Nebula as photographed by the Hubble Space Telescope. This region is a small part of a huge expanding remnant from a star that exploded many thousands of years ago. Hubble resolves tangled rope-like filaments of glowig gases. The 3-D model has been created for illustrative purposes and shows that that the giant bubble of gas has a thin, rippled surface. It also highlights that the emission from different chemical elements arises from different layers of gas within the nebula. In the imagery, emission from hydrogen, sulfur, and oxygen are shown in red, green, and blue, respectively. Credit: NASA, ESA, and F. Summers, G. Bacon, Z. Levay, and L. Frattare (Viz 3D Team, STScI)

"The man who leads with no limbs"
How a man born without arms or legs learned to swim, surf, skydive - and speak in front of thousands.