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Skywatching

Four moons of Jupiter are not as expected

Four moons of Jupiter are not as expected

Dec 8, 2023 / 4:00 am

Jupiter is prominent in our night skies at the moment. Look for a bright, untwinkling object in the south-east after dark and moving westward overnight. It is...

The 'solar maximum' is coming

The 'solar maximum' is coming

Dec 1, 2023 / 4:00 am

It has been predicted that next year will probably mark the maximum of the Sun's magnetic current activity cycle. The last one was around 2013. So, what...

The great Moon hoax of 1835

The great Moon hoax of 1835

Nov 24, 2023 / 4:00 am

Today, we are all familiar with the enormous amount of fake and misleading material clogging up the Internet. However, what was probably the most widely...

Astromomy is a changing science

Astromomy is a changing science

Nov 17, 2023 / 4:00 am

It was a clear, sunny day on Mars, with just a few streaks of cirrus cloud. A range of low hills defined the horizon. That was one of the images sent back to us...

Space telescope gives a closer look at the birth of stars

Space telescope gives a closer look at the birth of stars

Nov 10, 2023 / 4:00 am

Stars are the universe's Swiss Army knives. Starting from the primordial hydrogen dating back to the beginning of the universe, they produce all the...

In a galaxy far away and long ago

In a galaxy far away and long ago

Nov 3, 2023 / 4:00 am

It happened eight billion years ago. The birth of our planet, the Sun and the other bodies of the Solar System lay some 3.5 billion years in the future. There...

Looking for life on Venus

Looking for life on Venus

Oct 27, 2023 / 4:00 am

In mediaeval Europe there was a nasty fairy known as "Will-o'-the-wisp", who tempted unwise travellers to a watery doom in swamps. He manifested...

Asteroid dust helps us on earth understand the Solar System

Asteroid dust helps us on earth understand the Solar System

Oct 20, 2023 / 4:00 am

One of the most exciting astronomical photographs (not the picture above) in a while shows a handful of grey gravel in a metal container. What makes that gravel...

Probing the youth of the universe through BlackHoles

Probing the youth of the universe through BlackHoles

Oct 13, 2023 / 4:00 am

We hoped the James Webb Space Telescope would revolutionize our ideas about the youth of the universe. It is certainly doing that. Although it feels good for...

Not if alien life is found, but when say scientists

Not if alien life is found, but when say scientists

Oct 6, 2023 / 4:00 am

There has been a big change in the discussions scientists are having about life beyond the Earth. Instead of discussing whether there is life elsewhere in the...

Samples from astroid will help scientists learn more about Earth

Samples from astroid will help scientists learn more about Earth

Sep 29, 2023 / 4:00 am

On Sept. 25, a space capsule entered the atmosphere and parachuted to a soft landing in the Utah desert. It brought with it a scientifically priceless...

Digital photography has revolutionized celestial renderings

Digital photography has revolutionized celestial renderings

Sep 22, 2023 / 4:00 am

Thanks to the steady flow of images from the Hubble Space Telescope and the James Webb Space Telescope onto the Internet and into the media, we are getting...

Why are lunar craters round?

Why are lunar craters round?

Sep 15, 2023 / 4:00 am

The next couple of weeks will be a good time to look at the Moon through binoculars or a telescope. The best time to do this is not when the Moon is full. At...

What happens when a universe comes to an end?

What happens when a universe comes to an end?

Sep 8, 2023 / 4:00 am

Every physical system ends at some point, even universes. This prospect raises all sorts of issues. How will our universe end? What comes after? It is widely...

See the 'eye' of the 'Southern Fish'

See the 'eye' of the 'Southern Fish'

Sep 1, 2023 / 4:00 am

Late these evenings, if it is clear, we will see a moderately bright, white star low in the sky near the south-eastern horizon. That star is Fomalhaut...

A closer look at the rings of Saturn

A closer look at the rings of Saturn

Aug 25, 2023 / 4:00 am

These evenings, around 10 p.m., depending on how hilly your horizon happens to be, you will see a moderately bright, yellowish, starlike object low in the...

The race is on to a lunar oasis

The race is on to a lunar oasis

Aug 18, 2023 / 4:00 am

As I write this column, two spacecraft are racing towards the Moon—one is Russian, the other Indian. They share the same destination, deep, dark craters...

Cosmic dust is fuel for future generations of stars

Cosmic dust is fuel for future generations of stars

Aug 11, 2023 / 4:00 am

At this time of year, if the night sky is clear, dark and hopefully smoke-free, the Milky Way crosses the sky like a great arch, diving down to the southern...

Space telescope giving us surprising information about galaxies

Space telescope giving us surprising information about galaxies

Aug 4, 2023 / 4:00 am

One of the main purposes of the James Webb Space Telescope (JWST) is to probe the most distant reaches of the universe to see how the first galaxies formed, and...

Solar storms could cause chaos for internet, communications

Solar storms could cause chaos for internet, communications

Jul 28, 2023 / 4:00 am

Many books describe the sun as a ball of very hot gas. However, a ball of hot gas would be a sort of fuzzy blob. Images of the sun show it is nothing like that....

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