PIX4573697: Artist's view of the exoplanet Gliese 581c. - Artist's view of the exoplanet Gliese 581c. Gliese 581c, with a radius of 1.5 times that of the Earth, is the first exoplanet gathering the necessary elements to imagine the existence of a possible extra-terrestrial life. With a mass of 5 times that of the Earth, an average temperature of 0 to 40* C, this exoplanet rotates around its star in just thirteen days and is located 14 times closer to its star than the Earth is to the Sun., Dixon, Don (b.1951) / Bridgeman Images
PIX4584811: Formation of a micro hole black - Microscopic black holes. Artwork. - Artist's view of the formation of a microscopic black hole following the collision of very high energy waves. Microscopic black holes might be formed by the collision of high-energy wave packets. They would last for only fractions of a second before dissolving in a burst of quarks and gamma rays, Dixon, Don (b.1951) / Bridgeman Images