Skywatching
Four moons of Jupiter are not as expected
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
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
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
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
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
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
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
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
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
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
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
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?
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?
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'
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
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
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
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
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
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....