WHAT IS A MEASUREMENT SCALE? WHO MADE THE FIRST MEASUREMENTS? HOW ARE MEASUREMENT UNITS FIXED? FIND OUT MOREHow big is an ant? How high is a mountain? An observation of a property (characteristic)…
The Question: Does an acre have to have a specific shape? In The Wall by Pink Floyd, the teacher says the area of an acre is a rectangle that is one furlong…
Can you imagine what life was like before computers? Many of the world's most famous and important mathematicians came up with complicated theories and inventions well before the high-tech tool…
You will often hear astronomers refer to the brightness of an object in terms of an objects apparent magnitude.
The term apparent magnitude refers to a star's apparent brightness, or how bright the…
Light-year (distance traveled by light in one year) 5,880,000,000,000 mi Parsec (parallax of one second, or stellar distances) 3.259 light-years Velocity of light…
Magnitude is the degree of brightness of a star. In 1856, British astronomer Norman Pogson proposed a quantitative scale of stellar magnitudes, which was adopted by the astronomical community. He…
