What telescope instrument is used to counter the eastward rotation of Earth?
a. Newtonian focus
b. sidereal drive
c. active optics
d. Cassegrain focus
e. floppy mirrors
b
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A planet with an albedo of 10 percent absorbs 10 percent of the sunlight that strikes it and reflects the other 90 percent
Indicate whether the statement is true or false
The composition of Earth's atmosphere has not changed since its formation.
Answer the following statement true (T) or false (F)
A constant force acts on a moving object. The object makes a fixed magnitude of displacement in some direction
In general, in what direction is the displacement that will result in the object traveling with the least kinetic energy after the displacement occurs? A) The same direction as the force B) The direction does not matter. C) In a direction perpendicular to the plane of the force and the velocity of the object D) The opposite direction as the force E) Any direction perpendicular to the force
You discover that a nearby star, very similar to the Sun, has a velocity curve that has a period of 6 months, induced by the orbit of a planet. You infer that
A) the planet's orbit radius is greater than 1 AU. B) the planet's orbit radius is less than 1 AU. C) the planet's orbit radius cannot be determined based on the information provided. D) the planet's orbit radius is about 1 AU.