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专题验收评价
专题03 选词填空(上)考点专项练
内容概览
A·常考题不丢分
B·拓展培优拿高分
C·挑战真题争满分
【2023普陀二模】
Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.
A.confirmed B. measurable C.previously D. determine E. tracking F. habitable
G.virtually H. sensitive I. protect J. surprised K.system
A New Exoplanet in the System
In 2014, data from NASA’s Kepler Space Telescope allowed astronomers to announce the detection of three planets orbiting Kepler-138. This was based on a _____11_____dip in starlight as the planet momentarily passed in front of their star, a transit.
Benneke and his colleague Diana Dragomir, from the University of New Mexico, came up with the idea of re-observing the planetary _____12_____with the Hubble and Spitzer space telescopes between 2014 and 2016 to catch more transits of Kepler-138d, the third planet in the system, in order to study its atmosphere.
While earlier NASA Kepler space telescope observations only showed transits of three small planets around Kepler-138, Piaulet and her team were _____13_____to find that the Hubble and Spitzer observations suggested the presence of a fourth planet in the system, Kepler-138e.
This newly found planet is small and farther from its star than the three others, taking 38 days to complete an orbit.The planet is in the _____14_____zone of its star, a temperate region where a planet receives just the right amount of heat from its cool star to be neither too hot nor too cold to allow the presence of liquid water. Observing the exoplanet’s transit would have allowed astronomers to _____15_____its size.
With Kepler-138e, the masses of the_____16_____known planets were measured again via the transit timing-variation method, which consists of _____17_____small variations in the precise moments of the planets’ transits in front of their star caused by the gravitational pull of other nearby planets.
The researchers h