Speed Of Light
Today in the modern era we know that the speed of light(denoted by c in physics) in a vacuum is about 186282.4 miles per second(670616640 miles per hour!), but for …
Closest Star To Earth
The closest star to the Earth is the Sun, a yellow dwarf star with a mean distance of 93 million miles from Earth. That being said, what I think most …
What Is A Light Year?
What is a light year? The short answer to that question is that a light year is a measure of distance – the distance that light can travel in a …
The Moon
Ancient cultures of the past were very superstitious about the Moon, often worshipping it as a god. The ancient Greeks and Romans thought of the Sun and the Moon as …
The Sun
The Sun – that incredibly bright glowing orb in the sky that most of us take for granted. We may glance at it ever so briefly so as not to …
Hubble Space Telescope
The Hubble Space Telescope has been one of the most remarkable achievements of modern space exploration. It was launched from the Space Shuttle into lower Earth orbit at an altitude …
Why Is The Sky Blue?
A gorgeous blue sky is something most of us enjoy and admire, but why is the sky blue? I remember many years ago in the spring it was an unusually …
How Hot Is The Sun?
The Sun is something most of us take for granted day in and day out as we go about our busy lives. But when you really get down to it, …
The Solar System
There are currently 8 planets in the Solar System: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. In previous years the answer would have been 9, but Pluto has …