Posts by 

Editors of EarthSky

Time can warp and it’s related to space

The answer is yes. Time can warp. Strange as it may sound, both time and space do indeed warp around large celestial bodies. But it's complicated.

Is twilight shorter at the equator?

The sun drops quickly down toward the horizon - and just as quickly sinks below the horizon - as seen from Earth's equatorial latitudes.

Why does an airplane make a sonic boom?

A sonic boom happens when an airplane flies faster than the speed of sound. Chuck Yeager was the first to break the sound barrier in the year 1947.

Were ancient buildings more energy efficient?

Our sleek, glass-box buildings of today tend not to take climate into consideration. Were ancient buildings more energy efficient?

‘Mowing the lawn’ at high altitude

The ICE Bridge mission - dubbed "mowing the lawn" has been so successful that eight flights will be added keeping us in Chile until Thanksgiving.

Meteors, are they bright enough to read by?

Usually, meteors are not bright enough to read by. But some spectacular showers can offer a true spectacle of light and might be bright enough to read by.

Shackleton to satellites: Field-work and exploration

The Shackleton ill fated expedition in Antarctica comes to mind when we consider the perils of field-work in early Antarctic exploration.

What is a flammulated owl?

The flammulated owl is unusual. It's small. It's secretive. It "coos" instead of "hoots." And it's sensitive to changes in its environment.

Reza Fazel says medical imaging carries risks

Reza Fazel found that CT scans and nuclear medicine scans tests that use radioactive tracers inside the body contribute the most to higher doses of radiation.

Changing poles, a new kind of field work

Traveling to the poles is nothing new to me. But I notice the changing poles and on this trip my job will be to help measure and understand this change.