Business

Boeing sees full commercial air recovery by 2024

Boeing said Tuesday that the commercial aviation market should fully recover by 2024 from its pandemic slump, as the industry giant lifted its aerospace forecast for the next decade.

Consumer & Gadgets

Cellphone catches fire on Alaska Airlines jet upon landing

The cellphone of a passenger on an Alaska Airlines jet caught fire after the plane landed at the Seattle–Tacoma International Airport, forcing the crew to deploy evacuation slides to get everyone off, the carrier said Tuesday.

Business

Airbus profits take off as deliveries soar

Airbus said Thursday it had bounced back strongly into profit in the first half of the year as aircraft deliveries rose, leading the company to revise its performance forecasts upwards.

Business

Boeing to reduce 787 production after identifying new jet issue

Boeing is cutting production on the 787 Dreamliner after identifying a new problem with the plane, the company announced Tuesday in the latest in a series of setbacks as the aviation giant struggles to fully recover from ...

Business

United offers ray of hope to Boeing amid turbulent times

United Airlines' huge order for the 737 MAX offers a vote of confidence in the plane at the center of a historic crisis for Boeing, but the manufacturer still faces challenges, including China's ongoing ban of the aircraft.

Business

Boeing's next airplane likely to be delayed by FAA concerns

Federal regulators have indicated they likely won't certify Boeing's next airliner until 2023 because of questions about changes the aircraft manufacturer is making in software and hardware on a new version of the two-aisle ...

Business

United Airlines said to be near new Boeing, Airbus orders

United Airlines has scheduled of two public events for Tuesday raising expectations it will announce orders for more than 200 new Airbus and Boeing planes, an aviation industry expert said on Monday.

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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