Fans of our fair planet might recognize the outlines of these cosmic clouds. On the left, bright emission outlined by dark, obscuring dust lanes seems to trace a continental shape, lending the popular name North America Nebula to the emission region cataloged as NGC 7000. To the right, just off the North America Nebula’s east […]
Read More
This helmet-shaped cosmic cloud with wing-like appendages is popularly called Thor’s Helmet.
Read More
Interacting galaxies are understood to be common - in fact, repeated galaxy encounters can ultimately result in a merger of one single galaxy.
Read More
This recently released image from the Hubble Space Telescope shows long filaments of dust and gas appearing to circle a supermassive black hole.
Read More

November 2016: Picture of the Month

December 30, 2016
/ / /

triplet_system

Imaged at the millimeter wavelengths with the Atacama Large Millimeter Array in Chile, a triple star system is forming within the dusty disk some 750 light years away in the Perseus molecular cloud. The system consists of two protostars separated by a distance of 61 astronomical units and a third protostar at a distance of 183 astronomical units from the central protostar. The star system also has a spiral structure, indicating instability and fragmentation which can lead to multiple protostellar objects within the disk. This star-forming scenario is likely common, as almost half of all sun-like stars have at least one companion star.

For more information, check out APOD!

Read More

Star Talk: The quest for 1% – the past, present and future for measuring the Hubble Constant and the expansion of the Universe

November 13, 2016
/ / /

star_talk_oct “The quest for 1%: the past, present and future for measuring the Hubble Constant and the expansion of the Universe”, presented by Professor Hilding Neilson

Abstract: Almost a century ago, Edwin Hubble discovered that galaxies appear to be moving away from us and that farther galaxies moved at faster rates. This discovery revolutionized our view of the Universe and started the field of modern cosmology. Ever since, astronomers have been trying to better measure the expansion of the Universe, the Hubble constant, using numerous standard candles. In this talk, Professor Neilson will talk about the rich history of measuring the Hubble constant from some of the great arguments to the paradigm shift initiated by the results of the Hubble Space Telescope Key Project. He will conclude by discussing the future for measuring the Hubble constant to 1% precision to shed new insights into the dark matter and dark energy content of the Universe.

Read More

October 2016: Picture of the Month

November 5, 2016
/ / /

hydrogen_sky

This is the new and highest resolution map of the universe’s most abundant gas, hydrogen. The all-sky map of hydrogen’s 21-cm emission shows the abundance of the gas with brightness and the speed with color. The color in this map has been artificially set as blue to describe the radial motion toward us and green to describe the radial motion away. The band across the center of map is the plane of our own Milky Way, while the bright spots on the lower right is our neighboring Magellanic Clouds. The map collects data from over one million observations from both the northern Effelsberg 100-Meter Radio Telescope in Germany and the southern Parkes 64-Meter Radio Telescope in Australia. It should be noted that still many details are not yet well understood in this map.

For more information, check out APOD!

Read More

Star Talk: Variable Stars – Action in the Sky

October 4, 2016
/ / /

var_stars “Variable Stars: Action in the Sky”, presented by John Percy, Professor Emeritus of the Department of Astronomy & Astrophysics, and Dunlap Institute

Abstract: Stars aren’t changeless and boring. They may eclipse, pulsate (vibrate), flare, erupt, or even explode. These processes cause the stars to vary in brightness over time and, by studying these variations, we can learn about the nature, evolution, birth and death of the stars, and about the physical processes that occur within them. Variable stars help us to understand some of the most exciting and bizarre objects in the sky: exoplanets, supernovas, pulsars, quasars, gamma-ray bursts, and even black holes. I will also explain some of the ways in which Canadian astronomers, and skilled amateur astronomers, and my undergraduate research students are contributing to this research.

Read More

September 2016: Picture of the Month

October 1, 2016
/ / /

setp_pom

Nicknamed as Tianyan, or the Eye of Heaven, the Five-hundred-meter Aperture Spherical Telescope (FAST) is built within a natural basin in the Guizhou province of China. FAST, constructed with 4450 individual triangular-shaped panels, is the largest single dish radio telescope on Earth (its diameter is of course 500 meters). Designed to explore the Universe at radio frequencies, its operations will range from detecting hydrogen gas in the Milky Way and other galaxies, detecting distant pulsar, or even searching for radio signals from extraterrestrials.

For more information, check out APOD!

Read More
  • ASX 2016-2017 Sponsors

DISCLAIMER: The content of this web site is entirely the responsibility of a campus organization which is independent from the University of Toronto. The opinions expressed do not necessarily reflect those of the University. The University of Toronto shall not be liable for any damage resulting from the use or misuse of the contents of this web site.

[This webspace is being hosted by University of Toronto Student Life]