Bathing asteroids with nuclear weapons

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A gentle nudge with a nuke: deflecting Earth-bound asteroids

From Ars Technica:

In 2013, a small asteroid exploded in the atmosphere over Chelyabinsk, Russia. The sonic boom from the event sent more than a thousand people to the hospital, mostly from flying glass from shattered windows. The Chelyabinsk meteor was a relatively small chunk of space rock—asteroid researchers think it was probably about 20 meters (66 feet) across—but exploding over a city made it a noteworthy event. It’s probable many similar asteroids hit Earth on a regular basis, but most don’t happen to fly over metropolitan areas; they fall into the ocean or over lightly populated regions.

However, Earth has played target in the cosmic darts tournament before. Meteor Crater in Arizona, the Tunguska impact in Siberia in 1908, and most famously the Chicxulub asteroid in Mexico (which played a part in the extinction of the dinosaurs) are just three of many known examples. That’s why many people are looking at viable options for planetary defense: destroying or turning asteroids aside before they can hit Earth. And planetary defense is one reason the United States’ National Nuclear Safety Administration (NNSA) has given for not destroying some of its surplus nuclear warheads. [Read the rest at Ars Technica…]

If we could only build one huge observatory….

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Q: Suppose we can only build one big telescope. Should we look for life among the stars or the origins of the universe?

I participated in an experts’ roundtable for Aeon Magazine, in which we were asked (more or less facetiously) what single project we would support to settle either questions about the very early universe or the existence of life elsewhere in the cosmos. Of course my real answer is that we should support all the science, because discovery isn’t about looking for one thing, but seeing what new things we can find. Throwing all our money at one big project might accomplish something, but it’s a bad way to do science. But anyway, taking the question for what it is — a fun exercise in wishing — here’s my answer, along with thoughts from Ross Andersen and Caleb Scharf.

Unless you’re a werewolf, the full Moon isn’t to blame for your problems

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Get Over Your Full Moon Fears

From The Daily Beast:

The full Moon is making everyone crazy. More people get arrested when the Moon is full.
The new Moon is making everyone depressed.

Maybe you’ve heard things like that. Maybe you’ve said them yourself. It seems plausible that the second-brightest thing in the sky, the closest astronomical body to Earth, and the object largely responsible for the tides, could cause measurable changes in human behavior. After all, some animals coordinate their behaviors with the phase of the Moon.

As a result of this style of thinking, hospital workers will sometimes claim more births or injuries happen, police will notice more arrests, mental health professionals will feel their clients change behaviors, and so forth, depending on the Moon’s phase. Despite that, repeated studies have shown no strikingly different behavior: there aren’t big differences in car wreck frequency, births, murders, or depression incidents between the new Moon and full Moon. [Read the rest at The Daily Beast…]