An astronaut onboard a spaceship travels at a speed of 0.850c, where c is the speed of light in a vacuum, to the Alpha Centauri. An observer on the Earth also observes the space travel. To this observer on the Earth, Alpha Centauri is stationary and the distance between the Earth and the Alpha Centauri is 4.30 lightyear Learning Goal: Special relativity- Space travel I- Time dilation Length Contraction Space Travel Part A - What is the space travel time interval measured by the Earth Observer? OAt p =- Lo At viewed by Earth observer Keep 3 digits after the decimal point. Unit is yr. Stationary Stationary Ato (Viewed by Astronaut travel time measured by Earth observer = 5.059 yr stationary Alpha Centauri Submit Previous Answers AL shows a space travel as viewed Correct by two observers in different frames of reference. Correct answer is shown. Your answer 5.00127 yr was either rounded differently or used a different number of significant figures than required for this part. An astronaut onboard a spaceship travels at a speed of 0.850c, where c is the speed of Important: If you use this answer in later parts, use the full unrounded value in your calculations. light in a vacuum, to the Alpha Centauri. An observer on the Earth also observes the space travel. To this observer on the Earth, Alpha Centauri is stationary and the distance between the Earth and the Alpha Centauri is Part B - What is the space travel time interval measured by the Astronaut on the spaceship? 4.30 lightyear - Keep 3 digits after the decimal point. Unit is yr. travel time measured by Astronaut on spaceship = yr O You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Anawere Request Answer Part C - What is the distance between the Earth and Alpha Centauri measured by the Astronaut on the spaceship?Part C - What is the distance between the Earth and Alpha Centauri measured by the Astronaut on the spaceship? Learning Goal: Special relativity- Space travel I- Time dilation Length Contraction Keep 3 digits after the decimal point. Unit is light-yr. Space Travel AEd oAt pv = Viewed by Earth observer Stationary Stationary distance measured by Astronaut on spaceship = light-yr Ato Viewed by Astronaut tationary Submit Previous Answers Request Answer entaur shows a space travel as viewed X Incorrect; Try Again; 5 attempts remaining by two observers in different frames of reference. An astronaut onboard a spaceship travels at a speed of 0.850c, where c is the speed of light in a vacuum, to the Alpha Centauri. Insight: compare the distance between the Earth and Alpha Centauri as measured by the Earth Observer and the Astronaut in the spaceship, which one is the proper length, which one is the contracted length? An observer on the Earth also observes the space travel. To this observer on the Earth, How do they fit into the respective definitions? No submission. Alpha Centauri is stationary and the distance between the Earth and the Alpha Centauri is 4.30 lightyear . Part D - The length of the spaceship as measured by the Earth observer is 50.0 m. What is the length of the spaceship measured by the Astronaut on the spaceship? Keep 2 digits after the decimal point. Unit is meter. IVITAE ? length of spaceship measured by Astronaut on spaceship = m Submit Previous Anawere Request Answer X Incorrect; Try Again; 5 attempts remaining