256600

Skywatching

When is the moon full?

When is the moon full?

Oct 18, 2019 / 1:00 pm

If you have never watched the full moon rising above the hills on the other side of a lake, you really need to do something about that. It is beautiful and...

Saturn is the moon king

Saturn is the moon king

Oct 11, 2019 / 11:00 am

Researchers using the Subaru Telescope in Hawaii have found 20 more moons orbiting Saturn. This brings the total orbiting the planet to 82, overtaking Jupiter,...

Black holes shred stars

Black holes shred stars

Oct 4, 2019 / 11:00 am

The term "tidal disruption event" or TDE must be one of the biggest cosmic euphemisms around. This is what we say is happening when a star is being...

Visitors from beyond

Visitors from beyond

Sep 27, 2019 / 11:00 am

Every year, we can count on a comet or two visiting our neighbourhood in the solar system. For a few weeks these objects can be the most spectacular objects in...

A warm, wet world

A warm, wet world

Sep 20, 2019 / 11:00 am

Bizarre exoplanets — planets orbiting other stars — are interesting in that they help us understand how planetary systems form and how they work....

A world of extremes

A world of extremes

Sep 13, 2019 / 6:00 am

Hal Clement, a well-known science fiction writer, had a very particular story theme. He imagined bizarre worlds with extreme conditions, such as gravitational...

Heating up the Earth

Heating up the Earth

Sep 6, 2019 / 11:00 am

If, on a clear, sunny day you hold up a one-metre-square, flat piece of black cardboard to the sun, the cardboard will rapidly become very hot. That is because...

Mission to Europa

Mission to Europa

Aug 30, 2019 / 6:00 am

When the Voyager spacecraft sent back the first close-up images of Jupiter's moon Europa, we all had a shock. It looked nothing like what we expected. Until...

Flashes from the sky

Flashes from the sky

Aug 23, 2019 / 11:00 am

Fast radio bursts, or FRBs, are among the most puzzling things in modern astronomy. From some place in the sky, there is a sudden flash of radio emission,...

Search for aliens

Search for aliens

Aug 16, 2019 / 11:00 am

On page 190 of the Observer's Book of Astronomy, published in 1962, author Patrick Moore wrote about Mars: "The planet cannot be regarded as...

Star light, stars very bright

Star light, stars very bright

Aug 9, 2019 / 11:00 am

During clear evenings at this time of year, almost overhead you'll see the bright, bluish star Vega. Now, scan westward to find the bright, orange star...

Earth having meteor shower

Earth having meteor shower

Aug 2, 2019 / 6:00 am

We are about to pass through a stream of meteoric material once again. Most of it is made up of dust and sand grain sized particles of rock or ice, but there...

Dark matter is everywhere

Dark matter is everywhere

Jul 26, 2019 / 11:00 am

An unfortunate thing about science is that important discoveries take a long time to hatch. They can be utterly ignored for decades, until a new discovery makes...

Footprints on the moon

Footprints on the moon

Jul 19, 2019 / 11:00 am

Fifty years ago, in July, 1969, people all over the world were glued to their televisions or radios, monitoring the progress of mankind's first manned...

Spinning in space

Spinning in space

Jul 12, 2019 / 11:00 am

Long sojourns by astronauts on the International Space Station have shown us that people can recover from extended periods of being weightless under free fall....

Jupiter rising

Jupiter rising

Jul 5, 2019 / 6:00 am

For the last couple of months Jupiter has been the most spectacular object in the sky after the sun and moon. The giant planet lies in the south-east after...

Free falling in space

Free falling in space

Jul 1, 2019 / 2:55 pm

We often hear people explaining that "Things float around in space because there is no gravity.” This is not true. Gravity extends across the whole...

Exploding stars tell a story

Exploding stars tell a story

Jun 21, 2019 / 11:00 am

Understanding the expansion of the universe depends on our ability to measure the distances of very far-off galaxies. Most of these are so remote even our...

Another near miss

Another near miss

Jun 14, 2019 / 11:00 am

This autumn, we will have a close encounter with asteroid 2006 QV89. At its closest, it is estimated to be about 6.7 million kilometres away (around 17 times...

Our debt to starlight

Our debt to starlight

Jun 7, 2019 / 3:55 pm

Everything we have ever seen, we have seen by starlight. During the day, our surroundings are lit by the sun, a yellow dwarf star. On a clear night, we can see...

255720
256986
255964
255974