The first permanent mountaintop observatory was the Lick Observatory. Built in 1888 by the Warner and Swasey Co., the telescope sits in it’s original spot just east of San Jose and is still operating to this day.
We recently visited the observatory and talked with Steve Vogt, an astronomy professor at UC Santa Cruz, who used to sneak into the observatory as a kid.
Watch the video →
NASA satellite images of the Richat Structure.
The Richat Structure, also known as the Eye of the Sahara and Guelb er Richat, is a prominent circular feature in the Sahara desert of west–central Mauritania near Ouadane. This structure is a deeply eroded, slightly elliptical, 40-km in diameter, dome. The sedimentary rock exposed in this dome range in age from Late Proterozoic within the center of the dome to Ordovician sandstone around its edges.