Bad Astronomy | Astronomers discover a new type of star: BLAPs
http://www.syfy.com/syfywire/astronomers-discover-a-new-type-of-star-blaps

t’s not every day (or night, I suppose) that astronomers discover a new kind of star. In this case, it’s not so much that the stars are totally different from other stars,
and if you saw one you’d know right away something was amiss. Instead, these stars behave differently, in a way never seen before. And because of that, it took a special
kind of survey to even find them at all.

The stars are called Blue Large-Amplitude Pulsators, or BLAPs, an acronym that is both ridiculous and makes me very happy. They’re called this because a) they’re blue,
and 2) they pulsate, changing in brightness by the relatively large amount of 20 – 45%. That’s a lot. If the Sun did this we’d be alternately cooked and frozen.

Not only that, but these stars brighten and dim really quickly: They can go from one extreme to the other and back again in just over 20 minutes. Of the dozen or so found,
the shortest one pulses with a period of 23 minutes, and the longest 39. That’s incredibly fast. These are stars: Vast spinning balls of gas that tip the cosmic scales at
an octillion tons or ten. Changing something that size that rapidly and by that much is fearsome.

Jen takový lehký flastřík, ale radost velká! Dnešní potvrzení rezervace letenky jarní výpravy na La Palma! :))

La Palma - Visits - Observatory - Astronomy - Tours - Astrotourism | astrolapalma.com
http://www.astrolapalma.com/en/content/visits-observatorio-roque-de-los-muchachos

James Webb Space Telescope Surrounded by Rising Floodwaters - Scientific American
https://www.scientificamerican.com/...e/james-webb-space-telescope-surrounded-by-rising-floodwaters/

Isolated in a giant thermal vacuum chamber, NASA’s $8.6 billion next-generation observatory is riding out the worst of Hurricane Harvey

As of this writing, there have been no reports of flooding at Building 32 or other critical JSC facilities, and the center possesses several
electric generators as backup in the event of a power outage. JSC lies 13 feet above sea level at its lowest point, and 22 feet at its highest—
making it a relatively lofty point in the surrounding landscape, much of which is already submerged beneath rising floodwaters.

As Oceans Alkalized, Life Developed Bones and Shells - Astrobiology Magazine
http://www.astrobio.net/news-exclusive/oceans-alkalized-life-developed-bones-shells/

Z Technetu na iDnes:
Když se vědci neudrží: astronomové zřejmě dopředu prozradili velký objev
Nedávno zrozený obor „gravitační astronomie“ si podle zákulisních informací připsal důležitý milník: vědcům se zřejmě poprvé podařilo pozorovat stejnou událost běžným teleskopem a zároveň i detektory gravitačních vln. Co přesně viděli, zatím nevíme, ale nejspíš vznikalo zlato.

SLAC Experiment Proves It Rains Diamonds On Uranus and Neptune - Slashdot
https://science.slashdot.org/...32225/slac-experiment-proves-it-rains-diamonds-on-uranus-and-neptune

Cassini: The Grand Finale: Cassini's 'Inside-Out' Rings Movie
https://saturn.jpl.nasa.gov/resources/7751/

This movie sequence of images from NASA's Cassini spacecraft offers a unique perspective on Saturn’s ring system. Cassini captured the images from within
the gap between the planet and its rings, looking outward as the spacecraft made one of its final dives through the gap as part of the mission's Grand Finale.

Using its wide-angle camera, Cassini took the 21 images in the sequence over a span of about four minutes during its dive through the gap on Aug. 20, 2017.
The images have an original size of 512 x 512 pixels; the smaller image size allowed for more images to be taken over the short span of time.