Sirius, the brightest star, is 8.8 light-years from earth. that means
a) sirius is not part of the milky way.
b) sirius is closer to earth than the sun.
c) we see sirius as it looked 8.8 years ago.
d) it would take us 8.8 years to reach sirius.

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction

Which of the following statements best describes the big bang theory? the big bang theory describes the formation of the universe, which scientists believe happened 13.7 billion years ago. under this theory, the universe began as a very hot, very dense point in space that exploded. it stopped expanding 1 billion years ago. the big bang theory describes the formation of the sun. the sun began as a very hot, very dense point in space that began expanding outward. it still expands today. the big bang theory describes the formation of the solar system. the solar system was formed 13.7 billion years ago. it is still expanding today. the big bang theory describes the formation of the universe, which scientists believe happened 13.7 billion years ago. under this theory, the universe began as a very hot, very dense point in space that began expanding outward. it still expands today.