Dino-Era Asteroid Came from the Outer Solar System

A new chemical analysis confirms the Chicxulub impactor was a fragile type of asteroid that formed in the outer solar system, unlike several other ancient impactors.

Status Report: Gravitational Waves

Astronomers at the IAU report that we have now detected more than 200 gravitational-wave events.

Did the Milky Way Form Faster Than We Thought?



New research suggests that our galaxy’s first stars might have come together within a billion years after the Big Bang.

How to Define a Planet – Pt. 2

Hold your breath: astronomers are re-evaluating their definition of a planet. Spoiler: it won’t bring Pluto back into the family.

This Week's Sky at a Glance, August 16 – 25

The waxing gibbous Moon this evening shines just left of the handle of the Sagittarius Teapot. Mars is still close to Jupiter in the early morning sky but they're drawing apart day by day.

Status Report and Expectations for Comet Tsuchinshan-ATLAS

Is Comet Tsuchinshan-ATLAS falling apart? How bright will it likely get? We try to answer those questions and more.

August Podcast: Nova Watch in the Northern Crown

Let’s go on a tour of August's night sky. Find a seat for some “shooting stars,” watch Saturn climb the eastern sky, and start looking for a once-in-a-lifetime star blast. 

Presented by: Celestron.

Spruce Woods Star Party

The annual Spruce Woods Star Party (SWSP) in Spruce Woods Provincial Park in Manitoba, Canada, is RASC Winnipeg’s biggest event for members and their families. Held under the dark skies of Manitoba’s first Dark Sky Preserve, SWSP is a weekend of camping with fellow amateur astronomers.