Proof that Earth revolves around the Sun is obtained by the use of ______________ and the ______________
Fill in the blank(s) with correct word
parallax; aberration of starlight
You might also like to view...
The most widely used ceramic is silica in the form of _________.
Fill in the blank(s) with the appropriate word(s).
Modern mammals are descendants of
A) birds that were able to survive the impact that wiped out the dinosaurs 65 million years ago B) sea animals that colonized the land after the impact that wiped out the dinosaurs 65 million years ago C) early mammals that lived under the ground that were able to survive the impact that helped to wipe out the dinosaurs 65 million years ago D) early mammals that killed off the dinosaurs
Which statement about the Moon's solar month and sidereal month is correct?
A. The solar month is the same length as the sidereal month. B. The solar month is more than two days longer than the sidereal month. C. The solar month is more than two days shorter than the sidereal month. D. The solar month is used in our calendars during the summer season while the sidereal month is used only during the winter season.
If the distance between us and a star is doubled, the apparent brightness is decreased by a factor of four
Indicate whether the statement is true or false