Who originated the idea that planets go in ellipses around the ...

[anshika]

Who originated the idea that planets go in ellipses around the sun?
 
  A) Copernicus B) Ptolemy C) Kepler D) Galileo E) Brahe

Question 2

An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. The astronaut's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year).
 
  According to the astronaut, how long does the trip take? A) 14.4 y
  B) 22.7 y
  C) 9.34 y
  D) 15.0 y
  E) 4.20 y

[fur]

Answer to Question 1

C

Answer to Question 2

E

[anshika]

Thanks

[fur]

Welcome