Skywatching
Celestial change that causes the winter solstice
On Dec. 21, we will reach the winter solstice. The Sun will rise latest and set earliest, be lowest in the sky at noon and we will have the shortest period of...
Repeating high-energy explosions in space
The Canadian Hydrogen Intensity Mapping Experiment radio telescope (CHIME), located at the Dominion Radio Astrophysical Observatory just south of Penticton,...
Why we have the Centaur, the Phoenix and the Furnace in the night sky
All over the world, different races and cultures have impressed their myths on the stars. Heroes and objects from mythology are there in the sky as groupings of...
Our neighbouring black hole
Black holes are rather menacing objects. Stars, planets, dust and any other material getting too close fall in. There is an intense flash of radiation and...
Learning more about 'white dwarf' stars
It might be surprising that “white dwarf” stars, the relics of stars like our Sun that have run out of fuel, are useful cosmic stopwatches. The...
Learning from impacts areas on the Moon
If you look at the Moon through binoculars or a small telescope, two sorts of terrain stand out. There are lighter-coloured, mountainous regions that are...
Stars absorbing planets while leaving 'zombie' planets behind
It is widely accepted among the scientific community that over the next few billion years the Sun will swell into a red giant star, absorbing Mercury and Venus,...
Explosion detected in space was creation of a massive black hole
On Oct. 9, orbiting observatories detected the biggest burst of gamma rays we have ever seen. It was so strong it affected our ionosphere. It came from the...
Looking at Wolf-Rayet stars in outer space
The amazing images produced so far by the James Webb Space Telescope have captured the attention of the media. They are easy to find on-line, just search for...
Successful move pushing asteroid off course
NASA has just achieved a major feat in astronavigation. A spacecraft has successfully impacted an asteroid that is orbiting another asteroid. This is not just a...
Looking at 'sunquakes' and 'starquakes'
One of the programs at our observatory is monitoring activity on the Sun. This is done using two small radio telescopes. We do this because many of our...
A new look at Neptune
When the James Webb Space Telescope was launched, we all had great expectations as to what the telescope would show us. The instrument is living up to those...
Gauging ‘planetquakes’ and ‘moonquakes’
When the Apollo astronauts went to the Moon, among the instruments they installed were seismometers, devices for detecting vibrations in the...
The North Star is not the constant we think is
Most of us know how to find the Pole, or North Star. We find the Dipper and follow the line indicated by the pair of stars opposite the handle. It is the star...
Large asteroids are a danger to earth
At 07:17 local time on June 30, 1908, something entered the atmosphere over Tungusca, Siberia and exploded. The blast, equivalent to about 17 million tonnes of...
Searching for the 'holy grail' of planets
The holy grail in our search for exoplanets (planets orbiting other stars) is to find one with water and at the right distance from its star for that water to...
Sputterling light from a star does not always mean its death
In 2019, the astronomy world was keeping a close eye on Betelgeuse, a red supergiant star marking the left shoulder of Orion, the hunter, the most spectacular...
Radio telescopes and the world's electronic devices need to coexist
Light pollution — light pointlessly being directed in useless directions, usually upward — is a big problem for optical astronomy. The situation for...
The days are getting longer...literally
How long is a day? At the moment, days are getting longer and we don't know why. The Earth is taking a bit longer to rotate on its axis. We have known for...
Planets, stars and things between
If you want to make a comet, asteroid, planet, star or many other bodies, the recipe is the same. There is just one ingredient: the cosmic clouds of gas and...