Life in the future（Period 4 Reading and Writing）
the existence of galaxies was not recognized until the early 20th century.since then, however, galaxies have become one of the focal points of astronomical investigation.the notable developments and achievements in the study of galaxies are surveyed here.included in the discussion are the external galaxies (i.e., those lying outside the milky way galaxy, the local galaxy to which the sun and earth belong), their distribution in clusters and super clusters, and the evolution of galaxies and quasars.for further details on the milky way galaxy, see milky way galaxy.for specifics about the components of galaxies, see star, nebula, and cosmos.a future vehiclewhile many technological advances occur in an evolutionary manner, occasionally a revolutionary technological appears on the horizon that creates startling new conditions and profound changes.such is the case with the privately developed moller skycar, which is named after its inventor.the lamv is a vertical take-off and landing aircraft that can fly in a quick, quiet, and agile manner.it is a new type of vehicle that combines the speed of an airplane and the vertical take-off capability of a helicopter with some characteristics of a ground vehicle, but without the limitations of any of those existing modes of transportation.the lamv is not operated like traditional fixed—or rotary-wing aircraft.it has only two hand-operator uses to direct the redundant computer control twists to select the desired operating altitude and moves fore and aft to select the rate of climb.the right-hand control twists to select the vehicle’s direction and moves side-to-side to provide transverse (crosswise) movement during the hover and early-transition-to-flight phases of operation; it also moves fore and aft to control speed and braking.simply put, the lamv is user friendly.the lamv of the future will be 18 feet long, 10 feet wide, and 6 feet high and weight 2200 pounds.it will hold four passengers and a payload of 875 pounds (including fuel).the vehicle will have a maximum rate of climb of 6400 feet per minute and an operational ceiling of 30 000 feet.it will attain a top speed of 390 miles per hour at an altitude of 6000 feet and a cruising speed of 350 miles per hour at 25 000 feet, and it will have a maximum range of 900 miles at 80 passenger miles per gallon.the lamv also will be quiet enough to function as an acoustic“stealth”plane at 500 feet.it will have a vertical take-off and landing capability and emergency airframe parachutes, and it will be capable of using various fuels.