Patrick Tekeli from San Francisco asks

I was browsing the Cornell University Astronomy web site and I read in an answer to a question...

Brent Harrington from Bolton asks

I am trying to find out how much light curves at the Earth's surface due to gravity. Ideally, how...

Amanda from New Lebanon, Ohio asks

How are tides and eclipses related?

Christian from Peterborough asks

I have a question about black holes. If light/matter are drawn towards a black hole are they not...

Jack Racklyeft from North Sydney asks

How does the temperature of a liquid effect its refractive index?

Dean Burlock from Melbourne, Australia asks

Do you think scientists will ever create a wormhole? And if they are able to create a wormhole how...

Dmitri from Toronto asks

How do we know that universe is 13.5b years old, if time is not constant? The idea is the closer...

Ankit from Aligarh, India asks

What is the reason for earth acting like a magnet? The interior is spherical so why is the earth...

Peter Schwarz from Toronto asks

I understand that even in a finite volume, there are an infinite number of points. Why does the...

Scott Mayers from Saskatoon asks

Assuming the speed of light, c, what would be the distance of a photon traveling in empty space be...

Edward asks

When two open metal tubes on the roof of the car for the purpose of use as a roof rack, are...

Nicola from Smiljan asks

How would a Foucault Pendulum behave on the Moon?

Josh from Gatineau asks

A friend and I have been having an on going debate that I hope you can settle once and for all....

kyler from the Internet asks

If I were to tie a rope or something like that to the moon and have it dangle far enough toward...

Mike fattori from Toronto asks

When my smartphone is off, its screen is black. In the bright sun the black screen absorbs a lot...

Barry from Vancouver, BC asks

Like everyone else, I’ve been enjoying the images of the planet pluto from New Horizons....

Andre Depre from Tienen, Belgium asks

Can centrifugal force be used to create an inertia drive by tightening/pulling the orbiting...

Kyler Tonkin from Kingston, Ontario asks

I heard of an experiment that it is impossible to suck a liquid up a straw more than 10 meters....

Brian Buydens from Weyburn asks

When did scientists first realize that planets had mass? I was thinking that by the time of the...