Do you think it is possible that a 1-solar-mass horizontal branch star could harbor an advanced civilization? Explain your reasoning
What will be an ideal response?
A 1-solar-mass horizontal branch star is a late-stage low-mass star, burning helium. Life had time to develop, but it would have had to be very clever, with natural resources and probably a lot of cooperation to persist.
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Saturn's 1990 white spot had some similarities to Jupiter's Great Red Spot. Discuss some of the similarities and differences. Speculate as to what might cause these
What will be an ideal response?
Which of the following methods uses astrometry to detect extrasolar planets around other star systems?
A) detection of Doppler shifts in the spectra of the parent stars B) detection of reflected starlight C) detection of brightness changes in a star as a planet passes in front of it D) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky
Frank says that if you release the string when swinging a ball in a horizontal circle, the ball flies out in the radial direction defined by the string at the instant you release the ball. John says that it flies out along a tangent line perpendicular to the string, and that it then drops straight down to the ground. Which one, if either, is correct?
a. Frank, because the centrifugal force is no longer counteracted by the string. b. Frank, because balls naturally fly straight out. c. John, because there is no centrifugal force. d. John, because balls fall straight down when released. e. Neither, because although there is no centrifugal force, and the ball's velocity is tangent to the circle at the instant of release, the ball then follows a parabolic trajectory.
With a fixed force, you will impart the same acceleration to a body on the Earth and on the Moon
a. True b. False Indicate whether the statement is true or false