Last week, EarthSky published a series of photos of dramatic sunsets in Brazil, caused by the April 22 eruption of Chile’s Calbuco volcano. On Sunday afternoon – May 3, 2015 – we heard from Peter Lowenstein in Mutare, Zimbabwe, who said that the aerosols from this volcanic eruption have now crossed the South Atlantic and are causing dramatic sunsets in African skies.
Happy May Day!
May Day is an ancient spring festival in the Northern Hemisphere. It’s an astronomical holiday, one of the year’s four cross-quarter days, or day that falls more or less midway between an equinox and solstice.
UPDATE APRIL 30 AT 4 P.M. CDT (21OO UTC): Mission controllers at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland, have confirmed NASA’s MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft impacted the surface of Mercury, as anticipated, at 3:26 p.m. EDT.
Why do different institutions – NASA, NOAA, and the Japanese Meteorological Agency – publish slightly different global temperature measurements?
According to a new study, microbes eat the carbon and release it as CO2, where ends up back in the atmosphere and contributes to further warming.
Instead of pulling galaxies in our universe together, gravity seems to be driving them apart. How can gravity be repulsive, when our everyday experience shows it’s attractive? That’s why we need dark energy …
Why are astronomers excited about the first directly obtained visible light spectrum – or rainbow array of visible colors – bounced from the surface of an exoplanet? Look inside.
Sharks are incredibly unlikely to bite you. They’re even less likely to kill you. However, we remain fascinated with their ability – and occasional proclivity – to do just that.
During the Permian–Triassic mass extinction event 252 million years ago, most life on Earth perished. Scientists have now obtained evidence that ocean acidification played a key role in the die-off.
The shortest lunar month this year happens in between the new moons of April 18 and May 18. This lunar month is only 29 days 9 hours and 16 minutes long, or 3 hours and 28 minutes shorter than the mean lunar month of 29 days 12 hours and 44 minutes.