Robert Pettengill reports from the busy ACEAP (Astronomy in Chile Educator Ambassador Program) annual trip, happening now in Chile.

Members of the Astronomy in Chile Educator Ambassadors Program are heading to Chile for a tour of its great observatories, July 27 to August 5, 2019.

Astronomer Guy Ottewell talks about his awesome book about some of our solar system's most beloved outer worlds. As always, he provides the best charts anywhere!

Some called it the "astronomer's eclipse" because it passed near major observatories in Chile. Check out these beautiful images of the July 2, 2019, total solar eclipse.

It was the closest conjunction of 2 planets in 2019, between Mercury and Mars. It happened low in the evening twilight - and was best seen from Earth's Southern Hemisphere. Check out these photos from EarthSky Community members.

People have reported seeing Transient Lunar Phenomena - unusual flashes and other lights on the moon - for at least 1,000 years. Yet they're still mysterious. Now a scientist in Germany is using a new telescope to try to solve the mystery.

Guy Ottewell lives in England. His illustrations of 3-dimensional space are illuminating. Long summer twilights, explained.

They're not the brightest planets in the sky now, and they're visible only briefly after sunset. But - around June 17, 18 and 19 - Mercury and Mars will have the closest conjunction of 2 planets for 2019.

Earliest sightings of a young crescent in the west after sunset mark the start of the Islamic holy month of Ramadan. When will the UAE's moon-sighting committee see this month's young moon? If they're using binoculars and telescopes (and have clear skies), they might see it May 5. For the eye alone, the date is probably May 6.

For Northern Hemisphere skywatchers, it's the best evening apparition of Mercury in 2019. Now is the best time to look.