Science Porn

[Mystical]

Prepare to cream your jeans (and you ladies, feel free to do whatever is your physiological equivalent*).  Here's a Junocam flyover of Jupiter's Great Red Spot:

https://youtu.be/1zPsYP8h9EE







* and thank you so much, I do NOT need any details.  Spontaneous lactation, or something fluidic going on downstairs?  Nope, I'm fine not knowing.

Girls just.. cream their jeans, too? 

Did you skip out on biology and go right for cosmotology?

[vorlon13]

Prepare to cream your jeans (and you ladies, feel free to do whatever is your physiological equivalent*).  Here's a Junocam flyover of Jupiter's Great Red Spot:

https://youtu.be/1zPsYP8h9EE







* and thank you so much, I do NOT need any details.  Spontaneous lactation, or something fluidic going on downstairs?  Nope, I'm fine not knowing.

Girls just.. cream their jeans, too? 

Did you skip out on biology and go right for cosmotology?

willful ignorance

[vorlon13]

Hubble Space Telescope watching Phobos orbiting Mars:

[pocaracas]

Not sure it qualifies to be here... but...

[SteelCurtain]

An electric field can pull apart a millimeter-sized oil drop, causing it to shed thin rings from its equator that then break up into tiny droplets.




https://physics.aps.org/synopsis-for/10....119.034501

That may be one of the cooler pictures I've seen in quite some time. Danke.

[vorlon13]

Good news everyone !!!


Occultation data on MU69 is 'interesting' !!

Object is either-

very oblong or elongated

-or-

it is a very close binary pair

-or-

it is a contact binary

-or-

it is an oblong object possibly with a large crater or 'bite' taken out of it's mid section


Keep in mind, the occultation data is essentially lines across a silhouette, so the precise outline of the object(s) was not resolved, but the chords (lines) we have are definitely showing something more complex than a rounded lump.

And every day, New Horizons draws closer to MU69 for an encounter 1 billion miles further from the sun than Pluto on 1/1/2019.

[pocaracas]

Floating Water Bridge

When a high voltage is applied across two beakers filled with deionized water a phenomenon known as an electrohydrodynamic bridge can occur. The unsupported strand of water appears to defy gravity as the beakers are slowly separated. First demonstrated in 1893 by Sir William Armstrong, the floating water bridge has yet to be fully explained despite involving a number of important water science concepts.

The polar molecule water (H2O) has a permanent dipole moment and therefore acts as a dielectric fluid because it can be polarized in the presence of an applied electric field. The macroscopic behavior of the polarized fluid is governed by electrohydrodynamics, which describes several phenomena that occur as the magnitude of the electric field increases. These include an increase in meniscus height (electrowetting), bulk fluid circulation (Sumoto effect), and the ejection of charged droplets (electrospray). The electric field also exerts a force known as dielectrophoresis on the water molecules, which causes water to flow across the bridge and is likely involved in holding the stream together.

While this particular demonstration was performed using deionized water, any polar dielectric fluid could be used instead (e.g. glycerol or DMSO).

Also:

[Dropship]

the floating water bridge has yet to be fully explained despite involving a number of important water science concepts.

At a guess I'd say it's simply surface tension that's holding it together.

[pocaracas]

the floating water bridge has yet to be fully explained despite involving a number of important water science concepts.

At a guess I'd say it's simply surface tension that's holding it together.

The normal surface tension of water is well known not to be enough for this stunt.

[Anomalocaris]

I think the water bridge doesn't just levitate in thin air, but needs to form around a thread connecting the 2 beakers?