Clumps of debris from a disrupted planetesimal are irregularly spaced on a long and eccentric orbit around the white dwarf. Individual clouds of rubble intermittently pass in front of the white dwarf, blocking some of its light. Because of the various sizes of the fragments in these clumps, the brightness of the white dwarf flickers in a chaotic way. Credit: Dr Mark Garlick/The University of Warwick Living with a star today means we have a nice planet at a nice enough temperature to thrive, and we occasionally get treated to amazing light shows in the form of aurorae. This is only temporary,...
When the Sun Zots the Trees That’s a Scary Storm, Eh?
Our planet is constantly changing under the forces of humans, geology, and even the Sun. And while we can see what humans do daily and what geology does through quakes and eruptions almost weekly, catching the Sun being its bad self is a lot harder because it’s a lot...
Unexpectedly on the Endangered List: Antarctic Meteorites
Solar radiation heating the surface of a blue ice area. Photo taken during the 2023-2024 fieldwork mission of the Instituto Antártico Chileno (INACH) to Union Glacier, Ellsworth Mountains, Antarctica. Credit: Veronica Tollenaar, Université Libre de Bruxelles. As...
Invasive Species Boldly Go Where No Plant has Gone Before
Nordenskjöld glacier viewed from where its ice front was located in 2017. Credit: Dr Pierre Tichit Global travel and trade are making it easier and easier for invasive species to make their way to new parts of the world, including places where little to no life was...
Dear Future Self: Let’s Talk Climate Change
Credit: NOAA Recent research published in Science Advances and led by Madalina Vlascenu finds that when it comes to climate change, we can’t scare people straight. Stories of gloom and doom focused on the fate of our world don’t inspire people to change their ways and...
Closer Look: Following the Water Toward Climate Change
Image by Etienne Marais from Pixabay I’ve lived in my home for 17 years, which is the longest I’ve ever lived in one place. I like to garden, I participate in outdoor sports that are year-round, and this long-for-me timeline and familiarity with the outdoors means...
Caught on Camera and Apprehended
Mohutsiwa Gabadirwe (center of photo) and Peter Jenniskens (left, kneeling) at the site of the second find of a piece of asteroid 2018 LA recovered in the Central Kalahari Game Reserve in central Botswana. Credit: SETI Institute Our Solar System contains a whole lot...
Closer Look: Earth’s Magnetic Field
Image by PDPics from Pixabay One of the great myths we learn from TV and books is that you can take a compass and follow it to the North Pole.Folks, I am here to tell you that if you take a compass and follow its pointy little needle, it will take you to Northern...
Closer Look: The Requirements for Life
Hydrothermal-vent chimney. In the center of the photo, you can see the vent fluid which appears like dark smoke due to the high levels of minerals and sulfides contained in the fluid. Look closely, and you will also see the chimney is crawling with Chorocaris shrimp...
Closer Look: Solar Max is Coming in 2025
People in more northern and southern latitudes may have noticed that aurorae are getting more common than we’ve seen in recent years. This is thanks to our Sun’s habit of flipping its magnetic poles every eleven years. As the Sun’s magnetic field becomes quite chaotic...
Harsh environments ok for planets… not for life
Artist's impression of the massive star-forming region, with the planet-forming disk XUE-1 in the foreground. The region is drenched in UV light from massive stars, one of which is visible in the top left corner. The structure near the disk represents the molecules...