Ultima Thule revealed

NASA’s New Horizons spacecraft revealed this distant Kuiper Belt object to be a contact binary with many odd twists.

A visit to Chilescope Observatory

A trip south of the equator meant lots of work, but also some once-in-a-lifetime observations. 

How Copernicus moved the Sun

This astronomer’s ideas forced humanity to consider our planet a ball of rock circling the fiery Sun, and not the center of the universe.

Tackle a globular cluster showdown

Which of these marvelous stellar groups looks best through your telescope?

A Chile afternoon in the Moon’s shadow

Observers along a narrow track that crosses South America will witness darkness at midday July 2.


Sky this Month
StarDome and Path of the Planets

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