质量为m的探月航天器在接近月球表面的轨道上飞行，其运动视为匀速圆周运动，已知月球质量为M，月球半径为R，月球表面重力加速度为g，引力常量为G，不考虑月球自转的影响，则航天器的（   ）

    The last full moon of 2017 is going to appear a little bigger and brighter than most.

    Dec. 3 will bring a supermoon,____ (mean) a full moon that happens at perigee—the same time that the moon is closest to the earth.____this particular occasion, the moon will appear 7 percent larger and 16 percent brighter than usual. Not only will this be the only full supermoon of 2017,____it's also going to kick off a series of three full supermoons in a row. The full moons on Jan. 2 and Jan. 31 will be super ____(one) and even they'll be blue super moons,____means the second full moon in a single month.

    While some moonwatchers might be getting excited, some people think the hype（炒作）around supermoons isn't all it ____ (regard) as being. A scientist slammed（抨击）the term last year as something made up ____ (complete) and a waste of everyone's time. He acknowledged that supermoons would appear bigger and brighter, but that actually an amateur ____ (observe) wouldn't notice the difference. Another scientist ____ (make) a similar ____ (argue) back in 2012.

    If the supermoon makes you want to go out and appreciate the sky's beauty, we say “Go for it.”