Volcanic eruptions do more than send lava and clouds of noxious gas across the landscape, and trigger tsunamis and sonic booms. Sometimes they reach for space! In the case of the January 2022 underwater eruption of Tonga-Hunga Ha’apai, it sent a pressure wave through all altitudes of Earth’s atmosphere. Seismic stations and weather stations around the world (including the one on my front deck) recorded that wave as it boomeranged around the planet! And, there was another surprising result. The Tonga eruption breached Earth’s atmosphere and caused space-weather-like disruptions at the edge of space.Continue reading “The Tonga Eruption Reached Space!”
In the search for “potentially-habitable” extrasolar planets, one of the main things scientists look at is stellar activity. Whereas stars like our own, a G-type (G2V) yellow dwarf, are considered stable over time, other classes are variable and prone to flare-ups – particularly M-type red dwarf stars. Even if a star has multiple planets orbiting within its habitable zone (HZ), the tendency to periodically flare could render these planets completely uninhabitable.
According to a new study, stars like our own may not be as stable as previously thought. While observing EK Draconis, a G1.5V yellow dwarf located 110.71 light-years away, an international team of astronomers witnessed a massive coronal mass ejection that dwarfed anything we’ve ever seen in our Solar System. These observations suggest that these ejections can worsen over time, which could be a dire warning for life here on Earth.Continue reading “A Sun-Like Star Just Blasted out a Flare That Would be Devastating if it Happened Here”
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Precipitation is much more widespread throughout that solar system than commonly assumed. Obviously it rains water on Earth. But it snows carbon dioxide on Mars, rains methane on Titan, sulfuric acid on Venus, and could potentially rain diamonds on Neptune. The type of material falling out of the sky is almost as varied as the planets themselves. New research from a team led by Kaitlyn Loftus at Harvard found a similarity for all of the liquid materials that constitute rain throughout the solar system – all of the drops, no matter the material, are roughly the same size.Continue reading “What Would Raindrops be Like on Other Worlds?”
The Sun is not exactly placid, though it appears pretty peaceful in the quick glances we can steal with our naked eyes. In reality though, the Sun is a dynamic, chaotic body, spraying out solar wind and radiation and erupting in great sheets of plasma. Living in a technological society next to all that is a challenge.Continue reading “ESA is Considering a Mission to Give Advanced Warnings of Solar Storms”