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Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is land, most of which is located in the form of continental landmasses within Earth's land hemisphere. Most of Earth's land is somewhat humid and covered by vegetation, while large sheets of ice at Earth's polar deserts retain more water than Earth's groundwater, lakes, rivers and atmospheric water combined. Earth's crust consists of slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth has a liquid outer core that generates a magnetosphere capable of deflecting most of the destructive solar winds and cosmic radiation.
Flat Earth is an archaic and scientifically disproven conception of the Earth's shape as a plane or disk. Many ancient cultures subscribed to a flat-Earth cosmography, notably including ancient near eastern cosmology. The model has undergone a recent resurgence as a conspiracy theory.
The Moon is Earth's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have over time synchronized the Moon's orbital period with its rotation period at 29.5 Earth days, causing the same side of the Moon to always face Earth. The Moon's gravitational pull – and to a lesser extent, the Sun's – are the main drivers of Earth's tides.
Venus is the second planet from the Sun. It is a terrestrial planet and is the closest in mass and size to its orbital neighbour Earth. Venus is notable for having the densest atmosphere of the terrestrial planets, composed mostly of carbon dioxide with a thick, global sulfuric acid cloud cover. At the surface it has a mean temperature of 737 K and a pressure of 92 times that of Earth's at sea level. These extreme conditions compress carbon dioxide into a supercritical state close to Venus's surface.
In physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which causes mutual attraction between all things that have mass. Gravity is, by far, the weakest of the four fundamental interactions, approximately 1038 times weaker than the strong interaction, 1036 times weaker than the electromagnetic force and 1029 times weaker than the weak interaction. As a result, it has no significant influence at the level of subatomic particles. However, gravity is the most significant interaction between objects at the macroscopic scale, and it determines the motion of planets, stars, galaxies, and even light.
Crisis on Infinite Earths is a 1985 to 1986 American comic book crossover series published by DC Comics. Written by Marv Wolfman and pencilled by George Pérez, it was first released as a 12-issue limited series from April 1985 to March 1986. As the main piece of a crossover event, some plot elements were featured in tie-in issues of other publications. Since its initial publication, the series has been reprinted in various formats and editions.
Sir David Frederick Attenborough is a British broadcaster, biologist, natural historian, and writer. He is best known for writing and presenting, in conjunction with the BBC Studios Natural History Unit, the nine nature documentary series forming the Life collection, a comprehensive survey of animal and plant life on Earth.
Pseudoscientific beliefs in a flat Earth are promoted by a number of organizations and individuals. The claims of modern flat Earth proponents are not based on scientific knowledge and are contrary to over two millennia of scientific consensus based on multiple confirming lines of evidence that Earth is spherical. Flat Earth beliefs are classified by experts in philosophy and physics as a form of science denial.
Iced Earth is an American heavy metal band currently composed of only Jon Schaffer, formed in Tampa, Florida and based in Columbus, Indiana. They were formed in 1984 under the name the Rose, then Purgatory, by guitarist, main songwriter and bandleader Schaffer and original drummer Greg Seymour. Iced Earth released their debut album in 1990 and have since released twelve studio albums, four EPs, three compilations, three box sets, three live albums and eleven music videos.
The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States, then used to support the search for extraterrestrial intelligence. The signal appeared to come from the direction of the constellation Sagittarius and bore expected hallmarks of extraterrestrial origin. It remains the strongest candidate for an extraterrestrial signal ever.
Google Earth is a computer program that renders a 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles. Users can explore the globe by entering addresses and coordinates, or by using a keyboard or mouse. The program can also be downloaded on a smartphone or tablet, using a touch screen or stylus to navigate. Users may use the program to add their own data using Keyhole Markup Language and upload them through various sources, such as forums or blogs. Google Earth is able to show various kinds of images overlaid on the surface of the Earth and is also a Web Map Service client. In 2019, Google revealed that Google Earth now covers more than 97 percent of the world, and has captured 10 million miles of Street View imagery.
The Nibiru cataclysm is a supposed disastrous encounter between Earth and a large planetary object that certain groups believed would take place in the early 21st century. Believers in this doomsday event usually refer to this object as Nibiru or Planet X. The idea was first put forward in 1995 by Nancy Lieder, founder of the website ZetaTalk. Lieder claims she is a contactee with the ability to receive messages from extraterrestrials from the Zeta Reticuli star system through an implant in her brain. She states that she was chosen to warn mankind that the object would sweep through the inner Solar System in May 2003 causing Earth to undergo a physical pole shift that would destroy most of humanity.
Geography is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding of Earth and its human and natural complexities—not merely where objects are, but also how they have changed and come to be. While geography is specific to Earth, many concepts can be applied more broadly to other celestial bodies in the field of planetary science. Geography has been called "a bridge between natural science and social science disciplines."
Bobby Ray Simmons Jr., known professionally as B.o.B, is an American rapper, singer, and record producer. Raised in Decatur, Georgia, Simmons signed with producer Jim Jonsin through his Rebel Rock Entertainment label in 2006. Two years later, he signed a joint venture recording contract with fellow Georgia rapper T.I.'s Grand Hustle Records, an imprint of Atlantic Records. Following his major-label deal, Simmons quickly achieved commercial success when his 2009 debut single, "Nothin' on You", peaked the US Billboard Hot 100 chart and received three nominations—Record of the Year, Best Rap Song, and Best Rap/Sung Collaboration—at the 53rd Grammy Awards.
The Flash is an American superhero television series developed by Greg Berlanti, Andrew Kreisberg, and Geoff Johns, airing on The CW. It is based on the Barry Allen incarnation of DC Comics character the Flash, a costumed superhero crime-fighter with the power to move at superhuman speeds. It is a spin-off of Arrow, existing in the same fictional universe known as the Arrowverse. The series premiered in the United States on The CW on October 7, 2014, and ran for nine seasons until May 24, 2023. The series follows Barry Allen, portrayed by Grant Gustin, a crime scene investigator who gains super-human speed, which he uses to fight criminals, along with others who have also gained superhuman abilities.
The Last Man on Earth is an American post-apocalyptic comedy television series created by Will Forte. It aired on the Fox television network from March 1, 2015, to May 6, 2018. In addition to Forte starring in the title role, the series also starred Kristen Schaal, January Jones, Mel Rodriguez, Cleopatra Coleman and Mary Steenburgen as a small group of survivors.
Supergirl is an American superhero drama television series developed by Ali Adler, Greg Berlanti and Andrew Kreisberg that aired on CBS and later The CW from October 26, 2015, to November 9, 2021. It is based on the DC Comics character of the same name created by Otto Binder and Al Plastino. The series features Melissa Benoist in the title role. Supergirl is a costumed superheroine who is Superman's cousin and one of the last surviving Kryptonians from the planet Krypton. Part of the Arrowverse, it was initially set on a different Earth than that of the other television series of the franchise. During the show's fifth season, all the Earths of the Arrowverse were combined.
The Arrowverse is an American superhero media franchise and shared universe that is centered on various interconnected television series based on DC Comics superhero characters, primarily airing on The CW as well as web series on CW Seed. The series were developed by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, Geoff Johns, Ali Adler, Phil Klemmer, Salim Akil, and Caroline Dries. Set in a shared fictional multiverse much like the DC Universe and DC Multiverse in comic books, it was established by crossing over common plot elements, settings, cast and characters that span six live-action television series and two animated series.
Harrison Wells is the name of several characters portrayed by Tom Cavanagh in The CW's Arrowverse franchise, primarily on the television series The Flash. The character, created by Geoff Johns, Greg Berlanti, and Andrew Kreisberg, is an original creation for the series and is not based on any existing character appearing in comics published by DC Comics. Most versions of Wells are from parallel universes, defined by their high level of intelligence and scientific knowledge.
References
- ↑ "Nobel Prize-Winning Contributions". Inside Rensselaer. 2 (2). January 31, 2008. Archived from the original on 2016-01-07. Retrieved 2010-05-29.
- ↑ "The battle for life on earth". United Nations Radio. May 22, 2009.[ permanent dead link ]
- ↑ Botkin-Kowacki, Eva (May 10, 2016). "Early Earth's atmosphere was quite thin. Why does it matter?". Christian Science Monitor. ISSN 0882-7729 . Retrieved May 11, 2016.
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