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HALLEYS COMET
A comet is an object that travels around the sunbathe leaving a bright trail behind. For more than two thousand years, the make pass of Halleys Comet has been observed and recorded on Earth every 76 years. Its 1986 visit, however, was the first time that humans took a close aim at its nucleus. One spacecraft went within a few hundred kilometres of the nucleus. Two Soviet craft, Vega 1 and Vega 2, came within 10,000 km of the nucleus on March 6th and March 9th; and the European Space Agencys Giotto space probe passed within 600 km of Halleys Comet on March 14th. Pioneer Venus Orbiter found that the taint of gases and dust which make up the tail spread over a region about 20,000,000 km across, 15 quantify larger than the Sun. Scientists also discovered that the comet was losing about ten metres of secular from its surface every orbit, suggesting a lifetime of about just now ] ,000 orbits - in about 100,000 years it will disappear.
A. Mark the statements as True (T) or False (F). 1. Halleys Comet was first seen more than 2000 years ago. 2. In 1986, two of the spacecraft which observed Halleys Comet were from the Soviet Union. 3. The sun measures 20,000,000 km across. 4. Halleys Comet has a lifetime of about 100,000 years leftfield because it is losing material from its surface every orbit. B. 1.



How often can Halleys Comet be observed from Earth?

2. What is the tail of Halleys Comet made up of?

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HIGH-RISE
In October 1981, newspapers in the USA and the UK reported plans for a 169-storey building in Chicago. If this is built, it will be almost twice as pontifical as the 384-metre Empire State Building in freshly York. Since the early days of civilised man, buildings have been getting higher(prenominal) all the time. Today, all large cities have tall buildings, each for use as offices or as flats. These are called storied buildings. The tallest of a]i in fact, are not used for offices or for living, entirely are special structures for radio and television. For...If you want to get a full essay, order it on our website: Ordercustompaper.com



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