Most asteroids lie in a vast ring between the orbits of Mars and Jupiter. This main asteroid belt holds more than 200 asteroids larger than 60 miles (100 kilometers) in diameter.hey are also known as planetoids or minor planets. In total, the mass of all the asteroids is less than that of Earth's moon. But despite their size, asteroids can be dangerous. Many have hit Earth in the past, and more will crash into our planet in the future.
Heathrow Express. Heathrow Express is an airport rail link between London Heathrow Airport and Paddington. It opened in 1998 and is operated by the Heathrow Express Operating Company, a wholly owned subsidiary of Heathrow Airport Holdings. It is an open access operator and not subject to franchising.
Heathrow Airport (IATA: LHR, ICAO: EGLL) is a major international airport in west London, England. Heathrow is the busiest airport in the United Kingdom, busiest airport in Europe by passenger traffic, and third busiest airport in the world by total passenger traffic.he airport is the primary hub of British Airways and is a base for Virgin Atlantic. It has four passenger terminals (numbered 2 to 5) and a cargo terminal. Of Heathrow's 73.4 million passengers in 2014, 93% were international travellers; the remaining 7% were bound for UK destinations.