Leo, the Lion
Leo’s brightest star is blue-white Regulus, one of the brightest stars in the night sky. It is about 79 light-years […]
Our Star, the Sun
The Sun was born about 4.6 billion years ago from the gravitational collapse of a vast cloud of gas and
What causes the bright halo that sometimes surrounds the Moon?
This bright ring of light is quite common. It’s related to the same process that creates rainbows: refraction. In this
What causes the bright halo that sometimes surrounds the Moon? Read More »
How fast is Earth moving through space?
To begin with, Earth is rotating on its axis at the familiar rate of one revolution per day. For those
What is the nearest star?
Of course, the nearest star to Earth is the one we see every day — our dear old Sun. At