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Skywatching

Celestial change that causes the winter solstice

Celestial change that causes the winter solstice

Dec 16, 2022 / 4:00 am

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

Repeating high-energy explosions in space

Dec 9, 2022 / 4:00 am

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

Why we have the Centaur, the Phoenix and the Furnace in the night sky

Dec 2, 2022 / 4:00 am

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

Our neighbouring black hole

Nov 25, 2022 / 4:00 am

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

Learning more about 'white dwarf' stars

Nov 18, 2022 / 4:00 am

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

Learning from impacts areas on the Moon

Nov 11, 2022 / 4:00 am

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

Stars absorbing planets while leaving 'zombie' planets behind

Nov 4, 2022 / 4:00 am

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

Explosion detected in space was creation of a massive black hole

Oct 28, 2022 / 4:00 am

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

Looking at Wolf-Rayet stars in outer space

Oct 21, 2022 / 4:00 am

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

Successful move pushing asteroid off course

Oct 14, 2022 / 4:00 am

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'

Looking at 'sunquakes' and 'starquakes'

Oct 7, 2022 / 4:00 am

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

A new look at Neptune

Sep 30, 2022 / 4:00 am

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’

Gauging ‘planetquakes’ and ‘moonquakes’

Sep 23, 2022 / 4:00 am

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

The North Star is not the constant we think is

Sep 16, 2022 / 4:00 am

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

Large asteroids are a danger to earth

Sep 9, 2022 / 4:00 am

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

Searching for the 'holy grail' of planets

Sep 2, 2022 / 4:00 am

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

Sputterling light from a star does not always mean its death

Aug 26, 2022 / 4:00 am

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

Radio telescopes and the world's electronic devices need to coexist

Aug 19, 2022 / 4:00 am

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

The days are getting longer...literally

Aug 12, 2022 / 4:00 am

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

Planets, stars and things between

Aug 5, 2022 / 4:00 am

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...

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