A buoyant plume of smoke rises from a stick of incense. At first the plume is smooth and laminar, but even in quiescent air, tiny perturbations can sneak into the flow, causing the periodic vortical whorls seen near the top of the photo. Were the frame even taller, we would see this transitional flow become completely chaotic and turbulent. Despite having known the governing equations for such flow for over 150 years, it remains almost impossible to predict the point where flow will transition for any practical problem, largely because the equations are so sensitive to initial conditions. In fact, some of the fundamental mathematical properties of those equations remain unproven. (Photo credit: M. Rosic)
Is there anything more unpredictably beautiful than whorls of smoke?
STOP CALLING IT SOCCER
This picture reveals thick clumps of dust silhouetted against the pink glowing gas cloud known to astronomers as IC 2944. These opaque blobs resemble drops of ink floating in a strawberry cocktail, their whimsical shapes sculpted by powerful radiation coming from the nearby brilliant young stars.
| image: ESO
Space Sounds - Symphonies of the Planets
It’s time for another Episode Extra! (which is where you special blog readers get to check out really cool stuff to go along with my YouTube videos, like special features on a DVD, only way more special-er)
In my latest video, “Space Sounds”, we explored some truly awesome musical and sound creations that were literally made from scientific data collected from space. They are spooky, calming, expansive and just plain wonderful. Watch it here if you haven’t seen the episode yet.
Turns out people have been doing this for a while! In 1992, NASA released a now hard-to-find five-volume musical collection called Symphonies of the Planets. They took electromagnetic sensor data from Voyager 1 and 2’s trip past Jupiter and Saturn, which happened over a decade prior. Solar winds and stellar radio waves were converted into sounds accessible to our ears, and the result is some of the most calming ambient music I’ve ever heard. If only the Voyager probes weren’t running low on power today. Imagine the music we could create as they make their way out of the solar system!
An amazing GIF of a volcano erupting on Jupiter’s moon - via @simonowens
This superb shot is Jupiter’s moon Io, showing the Tvashtar Paterae volcanic region, as captured by NASA’s New Horizons satellite.
Random fact: Volcanoes are named for the Roman god Vulcan, who was a son of Jupiter, and this moon orbits the planet of the same name … whooooooooa man. (Io, however, is part of Greek mythology, and was a lover of Zeus)
This is not to be confused with the equally gorgeous Saturnian moon Enceladus and its spouting geysers (below).
The world says goodbye to a legend. Today David Beckham officially retired after a 20 year career. A well rounded, hard working footballer that gave all for his team. Goodbye David. #picstitch #beckham #legend #football
Noah is no longer fond of Miami as a vacation spot…
Topographical Map of the Moon centering on the south pole
Colors represent altitude:
- purple (over 9,000 metres below surface level),
- blue (3,000 below),
- green (zero altitude),
- yellow (2,000 metres above surface level),
- orange (4,000 metres above)
- red (8,200 metres above).
A massive impact crater known as South Pole - Aitken basin is seen here as the purple and dark blue patch just below the south pole and is 2,500 kilometers in diameter.
Picture: SPL / Barcroft Media (via X )
You can’t begin to appreciate the violent history of the moon until you see it like this.