Guy Ottewell lives in England. His illustrations of 3-dimensional space are illuminating. Long summer twilights, explained.
Image via Guy Ottewell's blog. Used with permission.
What is ball lightning? Scientists have been trying to figure that out for hundreds of years, and now it seems they may finally be close to solving one of Earth’s most intriguing natural mysteries.
Series of images showing the creation of a ball-lightning-like phenomenon in a laboratory. Image via David M. Friday et. al
Do you have friggatriskaidekaphobia … an irrational fear of Friday the 13th? Today isn’t Friday the 13th. But it is exactly 13 weeks before a Friday the 13th in September. Then, exactly 13 weeks after that, 2019’s second Friday the 13th will fall in December. Zoinks!
Image via lesaffaires.
It’s nearly the June solstice! Longest day for the Northern Hemisphere. Shortest day for the Southern Hemisphere. Details here.
From the December solstice to the June solstice, the sunset makes its way north, as illustrated in this photo composite by Abhijit Juvekar. Thanks, Abhijit!
The American Astronomical Society – chief organization for US astronomers – said it is in conversations with SpaceX about the impending launch of 12,000 Starlink satellites. The astronomers worry the satellites will interfere with their work of understanding the universe.
An image of the NGC 5353/4 galaxy group made with a telescope at Lowell Observatory in Arizona, USA on the night of Saturday 25 May 2019. The diagonal lines running across the image are trails of reflected light left by more than 25 of the 60 recently launched Starlink satellites as they passed through the telescope’s field of view. Although this image serves as an illustration of the impact of reflections from satellite constellations, please note that the density of these satellites is significantly higher in the days after launch (as seen here) and also that the satellites will diminish in brightness as they reach their final orbital altitude. Image via Victoria Girgis/Lowell Observatory
Nearly 100 countries have already signed up to organize national campaigns, to provide the public with an opportunity to vote. The deadline is July 30 to express interest in organizing a national campaign. The IAU will announce results in December.
Artist's concept of a landscape on an exoplanet, or planet orbiting a distant star, via the IAU
.Within the framework of its 100th anniversary commemorations, the International Astronomical Union (IAU) is organising the IAU100 NameExoWorlds global competition that allows any country in the world to give a popular name to a selected exoplanet and its host star.
The search for life on Mars usually involves looking for past or present microbes, invisible to the eye. Scientists at University of Illinois suggest searching instead for a type of rock formation known on Earth to be created by microbes.
An example of the "fettuccine" rocks at Mammoth Hot Springs in Yellowstone National Park. The pasta-like filaments are created by Sulfuri bacteria and are completely unique from other rock formations. Image via Bruce Fouke.
Alphecca. Gemma. Alpha Coronae Borealis or simply Alpha Cor Bor. They’re all names for one star – the brightest star in the constellation Northern Crown.
They’re not the brightest planets in the sky now, and they’re visible only briefly after sunset. But – around June 17, 18 and 19 – Mercury and Mars will have the closest conjunction of 2 planets for 2019.