Whenever summer rolls around, it's easy to forget the basics of sunscreen. How long should I wait after applying it to go in the sun, and how long can I stay in the sun with it on?
A solar day is a measure of how long it takes the Earth to rotate from one noon to the next, and today's summer solstice also happens to be the longest solar day of the year.
At a time in the sun's cycle when space weather experts expect less solar activity, our star is going bonkers with solar flares and coronal mass ejections. What effects will Earth feel?
While we on Earth are familiar with our own star, the Sun, the European Space Agency's PLATO mission will explore solar systems similar to ours as well as those that are more exotic.
If you've ever wondered why you can look at a solar eclipse and why it can harm your eyes, the answer is in the sun's rays.
The planets closer to the Sun are indeed hotter than the Earth is. But they are still not hot enough to melt the rocks they are made from.
For centuries, scientists have known when and where eclipses will be visible. They pack their bags, head for the line of totality and hope for the best – which doesn't always happen.
Gravity waves recorded in the sun for the first time reveal some interesting facts.
More than 2,000 years ago, the Babylonians understood the cycle of eclipses. They also regarded them as signs that could foretell the death of a king.
An astronomer explains how and why – and when – eclipses happen, what we can learn from them, and what they would look like if you were standing on the moon.
In five or seven billion years time, the Sun's life will come to an end. And it will be really spectacular - if you're watching from far enough away.
Some people think the sky is blue because of sunlight reflected off the ocean and back into the sky. But that's not the real reason.
The Parker probe will go closer to the sun than any other spacecraft has dared go before – literally touching it.
Energy from the sun's rays can cause skin damage and cancers. Sunscreens can absorb or reflect the dangerous UV light. Here's how it works.
Schools need to have a formal policy in place for how to deal with heatwaves effectively and keep children cool and well.
If we survive for another 7.59 billion years, our planet will spiral into the outer layers of the dying sun and melt away forever.
Full moons are good reason to look up – and the one on Nov. 14 is no exception. But here’s why you likely won’t see something shockingly different from other full moons you've observed over the years.
Sonification is a technique for converting data into sound. It could transform the study of distant worlds.
Our growing dependency on satellites for all forms of communication has made the problem of space weather even more acute.
In the search for life on other planets in the universe we need to find the right kind of star, and it needs to have the right kind of space weather.