Even if a probe were in a stable orbit near a black hole, we would still observe its signals redshifted by the gravitational field of the black hole.
Indicate whether the statement is true or false
Question 2
Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore, ________.
A) both stars have the same luminosity, but the apparent brightness of Star A is four times that of
B) both stars have the same luminosity, but the apparent brightness of Star B is four times that of
C) both stars have the same apparent brightness, but the luminosity of Star B is four times that of
D) both stars have the same luminosity, but the apparent brightness of Star B is twice that of Star A
Brain signals that control hunger.
The Black Bee-eater (Merops gularis) is a species of bird in the Meropidae family.
black widow
Black sharecroppers evicted from their tenant farms were photographed by Arthur Rothstein along a ..