Today, Mars has virtually no magnetic field.
Indicate whether the statement is true or false
Question 2
Which of the following methods uses the principle of orbital acceleration to detect planets around another star?
A) measuring a single Doppler shift of a star, one time
B) measuring change in the Doppler shifts of a star over the course of many nights
C) taking a picture of the planet next to the star
D) measuring the change of light of a star as the planet crosses in front of it