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Skywatching

Light pollution is the bane of stargazers

Oct 22, 2021 / 6:00 am

The old Royal Greenwich Observatory sits at the top of a hill on the south bank of the Thames, downstream from the centre of London. Founded in the 17th Century...

Looking for life on the Red Planet

Oct 15, 2021 / 6:00 am

Jezero crater is the 28-km diameter remnant of an ancient impact on Mars. Until maybe three billion years ago it contained a large lake that had a major river...

How unique is our Solar System?

Oct 8, 2021 / 6:00 am

During Earth's 4.5 billion-year history, it has been hit by things and possibly experienced small changes in its orbit. The earliest evidence for life we...

How big can solar flares get?

Oct 1, 2021 / 6:00 am

On Nov. 10, 1989 there was a large solar flare. This produced a coronal mass ejection or solar storm that arrived at Earth on Nov. 13, causing power outages and...

Comet 2I/Borisov pays a visit as it flies near the sun

Sep 24, 2021 / 6:00 am

In 2017, an elongated rocky object came into the Solar System from interstellar space, flew past the Sun and planets and returned to the dark, cold space...

Despite being 2.5 million light years away, we can see Andromeda

Sep 17, 2021 / 6:00 am

These evenings the Big Dipper is lurking low in the northern sky. The two stars opposite the handle, named Dubhe and Merak, are known as the...

Of all the planets we've seen so far, Mars is most like Earth

Sep 10, 2021 / 6:00 am

Out of all the worlds around the Solar System we have so far looked at, Mars is the most like ours. The geological and geographic resemblance to ours is...

NASA reveals picture of spiral galaxy Messier 51

Sep 3, 2021 / 6:00 am

NASA has just published a very intriguing picture of the spiral galaxy Messier 51. This spiral galaxy, which is similar to our galaxy, the Milky Way, is of...

The Sahara Triangle

Aug 27, 2021 / 6:00 am

In the 19th century there was a proposal to let martians know there was intelligent life on Earth. At the time it was widely accepted Mars was inhabited and...

Diamonds at the core?

Aug 20, 2021 / 6:00 am

These evenings it is hard to miss that bright, starlike object in the southern sky, shining steadily like a lamp. The lack of twinkling tells us that it is not...

Mountains on other worlds

Aug 13, 2021 / 6:00 am

Our world has lots of mountain ranges. Even a small telescope will show mountains on the moon. There are mountains on Venus and Mars. This might sound like a...

Dots in the sky

Aug 6, 2021 / 6:00 am

With modern astronomical instruments showing us collisions between black holes, and the traces of the birth of the universe, it is easy to think these were the...

There are many moons

Jul 30, 2021 / 6:00 am

In our solar system, all but two planets have moons, smaller bodies orbiting around them. Pluto, which used to be called the ninth planet out from the Sun, also...

Sunlit clouds at midnight

Jul 23, 2021 / 6:00 am

For us living north of latitude 45 degrees, which includes pretty well all of Canada, summer nights are short, and it does not get really dark. This is because...

An 'Earth-like' world

Jul 16, 2021 / 6:00 am

The latest research suggests that "Earth-like" planets are more common in our galaxy than we thought. Since our galaxy is not particularly unique,...

A way to 'see' into space

Jul 9, 2021 / 6:00 am

For the last few years, a group of nations, including Canada, has been working on what will be the largest radio telescope in the world. The project involves...

In the beginning... 'first there was nothing, which exploded'

Jul 2, 2021 / 6:00 am

In one of his books, author Terry Pratchett summarized the beginning of the universe in a simple statement: "First there was nothing, which exploded."...

Robots at the telescope

Jun 25, 2021 / 11:00 am

A 1950s picture of Edwin Hubble shows him using the 200-inch (five metre) optical telescope at Mount Palomar. Like all large telescopes, the instrument uses a...

Exploring a neutron star

Jun 18, 2021 / 8:02 am

If we could be transported to the surface of a neutron star, we would be destroyed down to the atomic level or beyond before we even knew we'd arrived. The...

Dust in the works

Jun 11, 2021 / 1:00 pm

Here on Earth, if we find our car covered with dust we brush or wash it off. If the vehicle is a robot explorer on the planet Mars, the issue becomes enormously...

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