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Look at the following statement from the Article:Astronomers have discovered thousands of planets outside our solar system, but as of March 2017 most of those found were not within the habitable zones of their stars and only a handful of them were approximately the size of Earth.Why did the author include this information?A.To demonstrate why the researchers involved in the discovery of the TRAPPIST-1 system need to study the chemical compositions and atmospheres of seven planetsB.To point out that while the TRAPPIST-1 system features a dwarf star, the rocky planets in the system are all within a habitable zoneC.To emphasize that it is unusual for astronomers to discover planets like those found orbiting TRAPPIST-1D.To question whether the three Earth-size planets near TRAPPIST-1 are truly orbiting within the habitable zone of such a compact star system

Question

Look at the following statement from the Article:Astronomers have discovered thousands of planets outside our solar system, but as of March 2017 most of those found were not within the habitable zones of their stars and only a handful of them were approximately the size of Earth.Why did the author include this information?A.To demonstrate why the researchers involved in the discovery of the TRAPPIST-1 system need to study the chemical compositions and atmospheres of seven planetsB.To point out that while the TRAPPIST-1 system features a dwarf star, the rocky planets in the system are all within a habitable zoneC.To emphasize that it is unusual for astronomers to discover planets like those found orbiting TRAPPIST-1D.To question whether the three Earth-size planets near TRAPPIST-1 are truly orbiting within the habitable zone of such a compact star system

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Solution

The author included this information to emphasize that it is unusual for astronomers to discover planets like those found orbiting TRAPPIST-1. This is because, as stated, most of the thousands of exoplanets discovered by March 2017 were not within the habitable zones of their stars and only a few were approximately the size of Earth. Therefore, the discovery of the TRAPPIST-1 system, with its seven Earth-sized planets in the habitable zone, is a significant and unusual event in the field of astronomy.

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Which statement from the Article best supports the notion that researchers are encouraged by the discovery of the TRAPPIST-1 star system?A."With this amazing system, we know that there must be many more potentially life-bearing worlds out there just waiting to be found," she said.B."Every now and then, you would see another planet, maybe about as big as twice the moon in the sky, depending on which planet you're on and which planet you look at."C.But the planets' proximity to TRAPPIST-1 doesn't mean they get exceedingly hot; the star, which is 200 times dimmer than our sun, is also much cooler.D.The planets circle tightly around a dim dwarf star called TRAPPIST-1, which is about the size of Jupiter.SUBMITExtras© 2024 Achieve3000 Inc. and its licensors.All Rights Reserved.

The reader can infer from the Article that __________.A.The location of a habitable zone in a star system must depend, in part, on the temperature of the central star around which the planets orbit.B.Planets that only take 20 Earth-days to orbit a star would be moving too quickly to support life, even if they had liquid water.C.Sending astrophysicists to investigate the TRAPPIST-1 system is the next logical step in the research of the planets there.D.Thomas Zurbuchen and Sara Seager disagree about the likelihood of finding an Earth-size planet that is truly habitable.SUBMITExtras

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All of the outer planets in the solar system are large exceptGroup of answer choicesNeptunePlutoSaturnUranus

Which statement does NOT correctly identify a planet in the solar system? aMercury is an inner terrestrial planet. bMars is an outer terrestrial planet cJupiter is an outer gas giant. dNeptune is an outer gas giant.

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