Business

Boeing delivers first 787 in a year

Boeing delivered a 787 Dreamliner to American Airlines on Wednesday, the first of that aircraft to be sent to a customer in over a year due to defects discovered in the plane.

Business

US regulators clear Boeing to resume 787 deliveries

After more than a year, aviation giant Boeing will be allowed to resume deliveries of its 787 Dreamliner aircraft "in the coming days," after the company made changes to its manufacturing process, US air safety regulators ...

Business

Airbus scraps A350 contract with Qatar Airways in feud

European aircraft maker Airbus has cancelled its contract to deliver 19 A350 planes to Qatar Airways, a source close to the matter said Wednesday, amid a feud between the two aviation giants.

Internet

Flight frenzy: Pelosi Taiwan trip swamps plane tracker

Hundreds of thousands of people tuned in to a flight tracking website Tuesday anxious to find out whether US official Nancy Pelosi was in fact going to Taiwan, in defiance of China's angry protests.

Business

Boeing says risk 737 MAX 10 could be canceled

Boeing's CEO said the company could cancel the 737 MAX 10 if regulators don't certify the jet before new crew alerting system standards take effect in December, according to a report Thursday.

Telecom

Verizon, AT&T delay some 5G service over airlines' concerns

Federal regulators say Verizon and AT&T will delay part of their 5G rollout near airports to give airlines more time to ensure that equipment on their planes is safe from interference from the wireless signals, but the airline ...

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Planet

A planet (from Greek πλανήτης, from the verb πλανώμαι planōmai I wander), is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.[a]

The term planet is ancient, with ties to history, science, myth, and religion. The planets were originally seen by many early cultures as divine, or as emissaries of the gods. Even today, many people believe in astrology, which holds that the movement of the planets affects people's lives, although such a causation is rejected by the scientific community. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. Even now there is no uncontested definition of what a planet is. In 2006, the IAU officially adopted a resolution defining planets within the Solar System. This definition has been both praised and criticized, and remains disputed by some scientists.

The planets were thought by Ptolemy to orbit the Earth in deferent and epicycle motions. Though the idea that the planets orbited the Sun had been suggested many times, it was not until the 17th century that this view was supported by evidence from the first telescopic astronomical observations, performed by Galileo Galilei. By careful analysis of the observation data, Johannes Kepler found the planets' orbits to be not circular, but elliptical. As observational tools improved, astronomers saw that, like Earth, the planets rotated around tilted axes, and some share such features as ice-caps and seasons. Since the dawn of the Space Age, close observation by probes has found that Earth and the other planets share characteristics such as volcanism, hurricanes, tectonics, and even hydrology. Since 1992, through the discovery of hundreds of extrasolar planets (planets around other stars), scientists are beginning to understand that planets throughout the Milky Way Galaxy share characteristics in common with our own.

Planets are generally divided into two main types: large, low-density gas giants, and smaller, rocky terrestrials. Under IAU definitions, there are eight planets in the Solar System. In order from the Sun, they are the four terrestrials, Mercury, Venus, Earth, and Mars, then the four gas giants, Jupiter, Saturn, Uranus, and Neptune. The Solar System also contains at least five dwarf planets: Ceres, Pluto (originally classified as the Solar System's ninth planet), Makemake, Haumea and Eris. With the exception of Mercury, Venus, Ceres and Makemake, all of these are orbited by one or more natural satellites.

As of June 2009, there are 353 known extrasolar planets, ranging from the size of gas giants to that of terrestrial planets.

This text uses material from Wikipedia, licensed under CC BY-SA