The world’s favorite orbiting observatory has transformed our knowledge about exoplanet atmospheres, the fate of the universe, and almost everything in between.
George Ritchey had great vision and skill. Henri Chrétien was a brilliant astronomer and optical engineer. Together, they created one of today’s best telescope designs.
The discovery of two ghostly galaxies created quite a hullabaloo in the astronomical community. But the jury’s still out on what’s really going on.
Think you know the big spiral M101? Take a deep dive into its myriad details, and you’ll know it like never before.
If you’re just starting out, our natural satellite makes a tempting target in the evening sky.
Seeing all 109 objects in one night should be on your observing bucket list.
Sky this Month
Venus sidles up to Uranus
StarDome and Path of the Planets
In Every Issue