PIX4633255: Trilobites - Artist's view - Phacops trilobites in a Silurian Sea - Artist's view of Phacops evoluting in the sea among the sponges (vauxia) to Silurian (- 436 million years). Trilobites of the genus Phacops scurry across the sandy bottom of a Silurian sea 436 million years ago. Also in this image are branching sponges from the genus Vauxia. Phacops is a marine arthropod of the class Trilobita. It is characterized by a rounded body with a globose head. The Phacops in this image are about six inches long / Bridgeman Images
PIX4634139: Hurricanes Katia, Irma, and Jose seen by satellite 09/2017 - Hurricanes Katia, Irma, and Jose 09/2017: Hurricanes Katia, Irma, and Jose seen by the Suomi NPP satellite on September 8, 2017. The Visible Infrared Imaging Radiometer Suite (VIIS) on the Suomi NPP satellite captured the data for a mosaic of Katia, Irma, and Jose as they appeared in the early hours of September 8, 2017. The images were acquired by the VIIRS “” day-night band,””” which detects light signals in a range of wavelengths from green to near-infrared, and uses filtering techniques to observe signals such as city lights, auroras, wildfires, and reflected moonlight. In this case, the clouds were lit by the nearly full Moon. The image is a composite, showing cloud imagery combined with data on city lights / Bridgeman Images
PIX4634142: Evolution of the universe: from the dark age to galaxies - In this diagram, the upper left represents the cosmic Dark Age, when the universe was so hot that atoms could not form and photons could not travel freely. The red area represents the de-ionization era, when the universe became transparent. The Cosmic Background Radiation comes from this time, Dixon, Don (b.1951) / Bridgeman Images
PIX4633402: Earth 443 million years ago - Artist View - Silurian Earth - This is how the Earth may have appeared 443 million years ago during the Silurian period. The northern most continent is what would become today's Siberia and to the west of that is the Panthalassic Ocean. South of the equator to the east is the early - Palaeozoic continent of Baltica later to form part of Eurasia, while to the east is the continent of Laurentia later to become the core of North America. Further south is the Rheic Ocean and to the west the Iapetus Ocean / Bridgeman Images
PIX4631516: Medaillon Arago (University Cite) - Arago medallion in Paris: In 1994, to pay tribute to Arago, 135 bronze medallions were encrusted in the ground, thus materializing the Meridian throughout the capital. On each medallion are inscribed the letters N and S, indicating the north and south, as well as the name of the scholar. This monument is the work of Jan Dibbets. One of the 135 bronze medallions into the ground along the Paris Meridian. The medallion is 12 cm in diameter and marked with the name ARAGO plus North and South pointers / Bridgeman Images
PIX4632762: Devonian Canopee - Artist's View - Devonian Canopy - Artist's View of an Archaeopteris Forest about 380 million years ago. The fossil record reveals that great forests of Archaeopteris covered much of the Earth 380 million years ago. The large umbrella - like fronds appear to have been optimized for gathering sunlight at the canopy level while still permitting enough light to reach the shorter and younger trees. It was great forests like these that helped to draw much of the carbon dioxide out of the primeval air while releasing the oxygen we breathe today / Bridgeman Images
PIX4632823: Eogyrinus - Eogyrinus was one of the largest tetrapods of Carbonifere. It could reach 4.6m in length. His fossils were found in England. He was part of the Anthracosaur amphibian group that survived as far as Permian. It is believed that these amphibians were the ancestors of the group from which the reptiles were derived. In the background, a Meganeura, a giant dragonfly whose wingspan could exceed 80 cm. A 15 foot long, 200 pound prehistoric amphibian from the genus Eogyrinus swims down a Carboniferous tributary 300 million years ago in what is today western Europe. Further up the tributary another Eogyrinus prepares to enter the water. Eogyrinus was one of the largest predators of its time, and perhaps the largest of the family Eogyrinidae. It probably spent most of its time in the water, and like modern crocodiles probably fed on fish and other swimming vertebrates. Also in this image, on the upper left on the trunk of a Sigillaria scutellata is a giant millipede and cockroach. Flying overhead and resembling giant dragonflies are prehistoric insects from the genus Meganeura. The tree - like plants making up the surrounding forest include Sigillaria scutellata and Lepidodendron aculeatum. The low ground cover includes various primitive ferns and mosses / Bridgeman Images
PIX4634727: Uranus - true and false colors - Voyager 2 - Uranus in true and false colors - Images obtained by the Voyager 2 probe on January 17, 1986 at 9.1 million km from Uranus. On the left image in real colors, the blue color is due to the presence of methane in the atmosphere of the planet; on the right, the false colours show a thick layer of fog around the south pole. The axis of rotation of the planet is different from that of all other planets in the solar system. While for most planets this axis is almost vertical, for Uranus it is almost lying on the plane of its orbit. These two pictures of Uranus - - one in true color (left) and the other in false color - - were compiled from images returned Jan. 17, 1986, by the narrow - angle camera of Voyager 2. The spacecraft was 9.1 million kilometers (5.7 million miles) from the planet, several days from closest approach. The picture at left has been processed to show Uranus as human eyes would see it from the vantage point of the spacecraft. The picture is a composite of images taken through blue, green and orange filters. The darker shadings at the upper right of the disk correspond to the day - night boundary on the planet. Beyond this boundary lies the hidden northern hemisphere of Uranus, which currently remains in total darkness as the planet rotates. The blue - green color results from the absorption of red light by methane gas in Uranus' deep, cold and remarkably clear atmosphere. The picture at right uses false color and extreme contrast enhancement to bring out subtle details in the polar region of Uranus. Images obtained through ultraviolet, violet and orange filters were respectively converted to the same blue, green and red colors used to produce the picture at left / Bridgeman Images
PIX4630418: The 8 planets of the solar system and the three dwarf planets. - Planets are represented in order of proximity to the sun. Since August 2006, Pluto is now called 134340 Pluto and is no longer considered a planet but designed as a dwarf planet. The other two dwarf planets are Eris (near Pluto, bottom right) and Ceres (bottom left) / Bridgeman Images
PIX4632195: Apollo 12: Eclipse of Sun by Earth - Apollo 12 view of Solar Eclipse - The Earth eclipse the Sun. Image obtained by the crew of Apollo 12 on their return trip to Earth in November 1969. Apollo 12 view of Solar Eclipse in November 1969. On Earth, solar eclipses happen when the Moon covers the Sun. On the Moon, the roles are reversed. It's Earth that covers the Sun. Apollo 12 astronaut Alan Bean, saw one in 1969. He was flying home from the Moon along with crewmates Pete Conrad and Dick Gordon when their spaceship flew through Earth's shadow / Bridgeman Images