Skywatching
Into the unknown
On New Year's Day, the New Horizons spacecraft had a close look at the most distant object yet explored, a snowman-shaped lump of ice and rock known as...
Water, water everywhere
Thirty-some years ago, one of my radio astronomy colleagues at NRC pronounced that "One way or another he was going to detect water on Mars.” This...
Long trip away from home
In 2013, Voyager 1 left the solar system, moving at around 62,000 km/h. In the last few weeks, Voyager 2 followed. They bear messages to any alien civilizations...
Winter solstice is coming
At 22:23 Universal Time Dec. 21, that is 14:23 PST, the sun will reach the southernmost point in its yearly travels across our skies; the winter solstice. We...
Binoculars for Christmas
Every astronomer, young or old, beginner or experienced should have a good pair of binoculars, maybe more than one. They can be used for a short bit of...
Looking into a star
Virtual reality (VR) is radically changing the way we do science. For example, this is an experience I had at a recent solar conference. I put on the headset,...
One-eye closed method
When we first rode in a car or train, one thing that we immediately noticed was that things nearby flash past while distant things move through our field of...
Solar wind a brisk breeze
Whether we have been lucky enough to see a total eclipse of the sun, or have just seen pictures, the most striking thing is the pearly, streamers and loops of...
Using radio to see the sky
As you come onto our observatory site, you get a good view of the assortment of antennas that act as the signal collectors for our radio telescopes. In front...
Redder than red
In the 18th Century, Isaac Newton passed white light through a prism, splitting it into a rainbow of colours. This happened because the different wavelengths of...
Birth of a planet
Although we have a pretty good idea how stars and planets form, we have only now got our first image of a newborn planet. This image was obtained by astronomers...
Hopping on an asteroid
Last summer a spacecraft arrived at the 900-metre diameter asteroid Ryugu, and deployed landers on its surface. The gravity of that small body is far too weak...
Life on Mars
One day, we will be living on Mars, either as visitor explorers and scientists, or as colonists. It might take a while, but if the will is there, our technology...
Sand dunes have a story
All of us, either in desert movies like David Lean's Lawrence of Arabia, or in real life have seen sand dunes. They look like huge waves or crescents, up to...
Black hole of Huge Data
We now live in an age of Big Data. Once we developed the technologies for handling and storing huge amounts of information, we went on to collect more and more...
Life on Saturn's moon?
Carbon is an unusual element. Its atoms can join directly together to form huge molecules consisting of long chains and other structures. As my high school...
Everything about nothing
In the 17th century, Evangelista Torricelli invented the barometer. In the same century, Blaise Pascal carried one of Torricelli's barometers to the tops of...
The expanding universe
The universe is expanding. It started to expand at the Big Bang almost 14 billion years ago. We know how fast it is expanding and that it is accelerating. We...
Big sky astronomy
In the past, most radio astronomy consisted of pointing the instrument at the right place in the sky. Most cosmic objects change little over a human lifetime....
Life needs a sun like ours
Current thinking is that here on Earth, chemical-based life, like ours, started in bodies of water, muddy waterside places or on slimy rocks. Organic molecules...