A wide open space (It could be your backyard or a park.) Two Hula-Hoops (Alternatively, you could use two flat rocks or bricks that you can sit on.) A yardstick or meterstick (Use one that has clear ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

In 1838, Friedrich Wilhelm Bessel won the race to measure the first distance to a star other than our Sun via the trigonometric parallax—setting the first scale of the universe. Astronomers from the U ...

Discover how astronomers use stellar parallax to navigate spacecraft in deep space without relying on Earth-based beacons.

The microscope has been going through something of a renaissance in the last 20 or so years. Once abandoned for all but the simplest work, it is now once again a primary tool of investigation into ...

One of the subtle, but cool features of iOS 7 is the parallax effect that gives on-screen elements a sense of depth and movement as you tilt your phone. In a recent article, Macworld's Marco Tabini ...