Ivan Semeniuk, Science Writer, The Globe and Mail

Eric Poisson, BSc, MSc, Ph.D, Department of Physics, University of Guelph General relativity, Einstein’s greatest scientific achievement is turning 100 this year. The speaker will describe how a companion body can raise a tide on a black hole, much as the Moon raises a tide on Earth and what consequences this can have on the motion of the two-body system.

The full Moon in September is traditionally referred to as the Harvest Moon, the full Moon that is temporally closest to the Autumnal Equinox (September 23 in 2015). As it turns out, this September’s full Moon represents the closest distance a full Moon gets relative to the Earth for this calendar year (a mere 356, 877 km). This makes it a so-called “supermoon” as it appears marginally larger and brighter than other full Moons throughout the year.

Come out and observe a rare total eclipse of the Moon at the Riverwood Conservancy! Join members of the Mississauga Centre of the Royal Astronomical Society of Canada as they set up large telescopes to look at the Moon. Observing will take place on the green in front of Chappell House. The event starts at 8:30 and is free and open to everyone. Large telescopes will be set up and pointed at the Moon as it moves into the Earth's shadow. The partial phases of the eclipse begin just after 9 pm.

Speaker bios, topics and other details at toronto.nerdnite.com PART 1: CBC – Afternoon PresentationsFREE Admission - 3:00pm-5:00pm Come nerd out about digital at the CBC! React to how we’re building the next generation of user experiences. Lean on our experiences. Sample our methods about Vote Compass. Interact with our interactives team...okay, you get it.

Join the Dunlap Institute on the evening of Sunday, September 27, 2015 to watch the total lunar eclipse. You won’t get another chance to see this spectacular celestial phenomenon until 2019. Even better, this year’s eclipse is special because it’s taking place during a “supermoon”, when the Moon is about as close to Earth as it gets. During this time, the Moon will appear subtly larger than normal. This event is FREE but we request that guests RSVP on our Facebook Event Page.

From the earliest days of the first hominids and through the epochs into the 21st century, mankind has held a deep fascination with the night sky. In today’s technological society, massive mountaintop observatories and high-tech space telescopes are at the forefront of astronomical research, but an ever-growing group of individuals continue to peer up from dark fields, secluded parks and their own backyards in the quest to explore and understand the universe.

What star is that? How can I spot Orion’s Belt? How many planets can I see without a telescope? Learn your way around the night sky. The Riverwood Conservancy, The Earthshine Astronomy and Space Science Organization and the Mississauga Centre of the Royal Astronomical Society of Canada are teaming up to offer a 4-week course on astronomy. Upon completion the student will be able to identify the brighter stars and constellations.

Speaker: Christa Van Laerhoven The planets didn’t start off where they are now. We know this from looking at the small things: the asteroids, comets, and Kuiper Belt objects. The movements of the planets leaves its fingerprint on how these small bodies are distributed. Indeed, the small bodies are a better tracer of planet migration than the planets are. This talk will include an overview of the formation and migration of planets in the solar system, including the “Grand Tack” and “Nice Model.” It will also touch on how the planets might move in the future.

Chris Hadfield is back with something completely new: Generator. Blending the line between education and entertainment, Generator will bring together scientists, musicians, comedians and more to deliver an energetic evening of organized chaos. Some of the names you’ll know by heart, others you’ll come to love. Chris Hadfield’s Generator is exploration through the eyes of explorers. From the caverns of the mind to the endless universe, we’re here to celebrate the journey that is one step further.