Equinox means “equal night.” And you might hear that day and night are equal at the equinoxes. Yet Earth’s air and our sun conspire to give us more day than night at an equinox.
Which stars are the most likely to have habitable planets? A new study suggest that K stars – between the dimmest M-type red dwarfs and sunlike stars – might provide the sweet spot for life.
The Morgan-Keenan star classification system. Our sun is a yellow G star. Image via Las Cumbres Observatory.
The March 20, 2019, equinox is an event that happens on our sky’s dome and a seasonal marker in Earth’s orbit around the sun.
The day arc of the Sun, every hour, during the equinox as seen on the celestial dome, from the pole. Image via Tau?olunga at Wikimedia Commons.
For the first time, scientists made a successful in situ collection of bacteria living in hot springs in Yellowstone National Park and using an unconventional source – electricity – for food and energy.
One of the hot spring pools of hot water in Heart Lake Geyser Basin where the bacteria were collected. Image via WSU.
University of Michigan astronomers say a hyper-runaway star didn’t originate from the galaxy’s center, as previously believed. Instead, they say, a cluster of young stars booted it from the galaxy’s disk.
Using one of the Magellan Telescopes in Chile as well as the data from the European Space Agency (ESA) space mission Gaia, scientist recreated the trajectory of a massive “hyper-runaway star.” The trajectory shows the star was ejected from the Milky Way disk, not the Galactic center as previously believed. Image via Kohei Hattori/ University of Michigan.https://news.umich.edu/u-m-researchers-confirm-massive-hyper-runaway-star-ejected-from-the-milky-way-disk/
Opportunity – nicknamed “Oppy” – was active on Mars from 2004 until June, 2018, when a planet-wide dust storm covered it. Its final image is a panorama, acquired from Opportunity’s final resting place in Mars’ Perseverance Valley.
View complete image. https://mars.nasa.gov/resources/22341/opportunity-legacy-pan/ | This image is a cropped version of the last 360-degree panorama taken by the Opportunity rover's Panoramic Camera (Pancam) from May 13 through June 10, 2018. The view is presented in false color to make some differences between materials easier to see. Image via NASA/JPL-Caltech/ Cornell/ ASU.https://www.jpl.nasa.gov/news/news.php?release=2019-038
In January, scientists captured footage of what might be a new species of killer whale near Antarctica.
These whales show their blunt heads and tiny eyepatches in 2011. Imag via NOAA/J.P. Sylvestre.
Happy birthday to all you March babies. Your month has 2 birthstones – the aquamarine and the bloodstone.
The Ides of March are March 15. We in modern times probably wouldn’t know about them – or know we’re supposed to beware of them – if it weren’t for William Shakespeare.
Image via Encyclopedia Britannica.