The most important thing to consider when choosing a projector, is what you want projected. For more great ways to get cold-weather projects finished quickly, check out our picks for the best snow shovels, snow blowers, and sidewalk scrapers.

Most simply plug in and are ready to go, so you can avoid those long, cold hours outside hanging physical lights. These Christmas light projectors allow you to create the festive atmosphere you’re looking for, without ever stepping foot on a ladder. According to the (CPSD) Consumer Product Safety Division, there are about 200 injuries each day during the holiday season, and about half of them are decorating-related falls. Originally published on up Christmas lights is a great way to spread holiday cheer throughout your neighborhood, but it’s also a time-consuming and potentially dangerous project. NASA's Dawn spacecraft provided a rare glimpse inside the huge asteroid Vesta recently, and the probe will return similar data about Ceres - the largest body in the asteroid belt - when it arrives at the protoplanet next year.įollow Mike Wall on Twitter and Google+. 'An asteroid’s interior reveals its thermal history, which constrains the initial conditions of the protoplanetary disk during planetesimal formation.' 'Asteroid interiors are the terra incognita for the next generation of asteroid researchers,' they write. For example, little is known about the interior structure of space rocks. While astronomers have made a lot of progress in the last decade or so, much remains to be learned about asteroids, DeMeo and Carry say. 'The understanding goes both ways, though, because the idea of planetary migration and a more dynamic planetary system history was really propelled by what we saw around other stars.' 'Our solar system is sort of the gold standard for planetary systems we have so much more detail about our own solar system that it can help fill in the gaps with extrasolar systems,' DeMeo told via email. While recent asteroid surveys are shedding light on the history of our own solar system, they could reveal insights about the formation and evolution of exoplanet systems as well, the researchers said. 'Jupiter would have moved right through the primordial asteroid belt, emptying it and then repopulating it with scrambled material from both the inner and outer solar system as Jupiter then reversed course and headed back towards the outer solar system,' DeMeo and Carry write, stressing that further observations should nail down how faithfully this scenario represents reality. Indeed, the distribution and composition of asteroids in the belt suggest that Jupiter made a sunward move early in solar system history, perhaps coming as close to our star as Mars is today, the researchers say. 'That trend doesn't hold at the smallest sizes, which hints that the solar system was more dynamic than we originally predicted,' DeMeo told via email.

But newer findings have put the lie to the notion of a static asteroid belt, the researchers said. Many researchers thus thought that most asteroids in the belt haven't strayed far from the orbits in which they formed.

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