A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object. B. Turning a star from white to blue C. In future sun would become blue D. Black hole was blue at its start
A. In asteroid belt between the orbits of mars and jupiter B. In asteroid belt between the orbits of mars and venus C. In asteroid belt between the orbits of jupiter and venus D. Everywhere in the sky
A. Size of the earth in relation to that of moon B. Orbit of moon around earth C. Direction of rotation of earth around sun D. Area of the sun covered by the moon
