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.
The quickest way to Paddington from Terminal 4 at Heathrow Airport is by train. There are 2 train services to choose from. The Heathrow Express is faster (at around 15 minutes â¦) and more frequent, but more expensive. Heathrow Connect takes 25 minutes, but is cheaper.etween Terminals 1, 2 and 3  Heathrow Terminals 1, 2 and 3 are close together at the centre of the airport and linked by a pedestrian underpass with moving walkways. Just fo â¦ llow the signs for your terminal.  Approximate walking times between terminals are:   Terminal 1 - Terminal 2: Seven minutes.