An Earth observation satellite or Earth remote sensing satellite is a satellite used or designed for Earth observation (EO) from orbit, including spy satellites and similar ones intended for non-military uses such as environmental monitoring, meteorology, cartography and others. The most common type are Earth imaging satellites, that take satellite images, analogous to aerial …

Earth observation satellite's data is most used in archaeology, cartography, environmental monitoring, meteorology, and reconnaissance applications. [citation needed] As of 2021, there are over 950 Earth observation satellites, with the largest number of satellites operated Planet Labs.

A near-Earth object (NEO) is any small Solar System body whose orbit brings it into proximity with Earth.By convention, a Solar System body is a NEO if its closest approach to the Sun is less than 1.3 astronomical units (AU).If a NEO's orbit crosses the Earth's orbit, and the object is larger than 140 meters (460 ft) across, it is considered a potentially hazardous object (PHO).

The Earth Observing System (EOS) is a program of NASA comprising a series of artificial satellite missions and scientific instruments in Earth orbit designed for long-term global observations of the land surface, biosphere, atmosphere, and oceans.Since the early 1970s, NASA has been developing its Earth Observing System, launching a series of LANDSAT …

Bhaskara-I. Bhaskara-I, weighing 444 kg at launch, was launched on 7 June 1979 from Kapustin Yar aboard the Intercosmos launch vehicle. It was placed in an orbital Perigee and Apogee of 394 km and 399 km at an inclination of 50.7°. The satellite consisted of- Two television cameras operating in visible (600 nanometre) and near-infrared (800 nanometre) and collected data …

The highest temperature recorded on Earth measured in three major ways: air, ground, and via satellite observation. Air measurements are used as the standard measurement due to persistent issues with unreliable ground and satellite readings. Air measurements are noted by the World Meteorological Organization (WMO) and Guinness World Records among others as …

Modern flat Earth belief originated with the English writer Samuel Rowbotham (1816–1884). Based on conclusions derived from his 1838 Bedford Level experiment, Rowbotham published the 1849 pamphlet titled Zetetic Astronomy, writing under the pseudonym "Parallax".He later expanded this into the book Earth Not a Globe, proposing the Earth is a flat disc centred at the …

The fourth-generation satellites, the GOES-R series, are being built by Lockheed Martin using the A2100 satellite bus.The GOES-R series is a four-satellite program (GOES-R, -S, -T and -U) that will extend the availability of the operational GOES satellite system through 2036. The first satellite of the series, the eponymous GOES-R, was launched on 19 November 2016.

Apollo was later dedicated to President John F. Kennedy's national goal for the 1960s of "landing a man on the Moon and returning him safely to the Earth" in an address to Congress on May 25, 1961. It was the third US human spaceflight program to fly, preceded by the two-person Project Gemini conceived in 1961 to extend spaceflight capability ...

Because its orbit takes it between the Earth and the Sun, Venus as seen from Earth exhibits visible phases in much the same manner as the Earth's Moon. Galileo Galilei was the first person to observe the phases of Venus in December 1610, an observation which supported Copernicus's then-contentious heliocentric description of the Solar System. He also noted …