Tag: Light

Light therapy has become an increasingly popular wellness tool for managing skin conditions and overcoming jet lag. But can you actually bring such devices onto a plane in your carry-on? What rules exist around medical devices and electronics? Do international flights complicate things? In t...

For nearly all of human history, once the Sun went down and the sky darkened, so long as you had a clear, moonless night, you’d be greeting with a spectacular, thrilling night sky: with thousands of stars, a clear view of the Milky Way, and several faint, fuzzy nebulae all visible to your nake...

Collisions in space are really bad. Even with our current technology, a piece of space debris moving at Earth escape speed (roughly 11.2 kilometers per second) weighing 30 grams (an ounce) packs a punch equivalent to nearly two megajoules. That's as much energy as it takes to lift a one ton...

The practical use of resonant optical cavities dates back to the Fabry-Perot Interferometer, devised by Charles Fabry and Alfred Perot, which is a fairly simple, but nevertheless ingenious, arrangement of two semi-transparent mirrors. See below for a great demonstration video from MIT...

Somewhere, far away, if you believe what you read, there’s a hole in the Universe. There’s a region of space so large and empty, a billion light-years across, that there’s nothing in it at all. There’s no matter of any type, normal or dark, and no stars, galaxies, plasma, gas...

Whenever you take a look out there at the vast abyss of the deep Universe, it’s the points of light that stand out the most: stars and galaxies. While the majority of the light that you’ll first notice does indeed come from stars, a deeper look, going far beyond the visible portion of th...

While this is a troubling situation that disrupts the behavior of humans and all animals, it affects astronomers more than most, as the field of astronomy relies on being very sensitive to faint objects in the night sky; more light pollution of all types, including from bright satellite streaks, mea...

When we’re not fully in the body — grounded — it doesn’t feel good. This is because we’re out of balance. Many of us think that spiritual means we live only or mostly in the spirit. In truth, it takes balance of the body-mind-spirit Triple Powers to ...