You probably heard, and perhaps already observed comet NEOWISE, one of the most remarkable objects of this year’s summer sky. Watching a transient celestial event such as a comet is always a moment to remember! In this post, we will guide you through a few relatively simple steps to observe the comet and record the…
On January 6, 2017, I was invited to a demonstration of the 4 1/2 inch telescope under development by Unistellar. I was present from 1930 to 2030 (sunset was at 1641). The site of the demonstration was southwest of Las Vegas, Nevada, a considerable distance out of town; however, the lights of the city could…
On april 19th, asteroid 2014 JO25 was at its closest to earth (1.9 million km, almost five times farther than the moon). This 650m-wide rock belongs the categories of NEO (Near Earth Objects): it will probably impact earth one day because its orbit crosses earth’s orbit. But be reassured, this is a probabilistic calculation made…
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