Astronomy13h
Does a comet’s period change because it loses mass every time it nears the Sun?
Because the period of an object does not depend on its mass, comets’ orbital periods remain unchanged due to mass loss.
'Planetary parade' will see SIX planets align in rare spectacle - here's the best time to spot Mars, Jupiter, Neptune, Saturn, Uranus and Venus in the night sky
On Tuesday evening, six planets will line up in the night's sky - Mars, Jupiter, Neptune, Saturn, Uranus and Venus. Best ...