scienceyoucanlove
scienceyoucanlove:

This is an electron micrograph of a T-lymphocyte killer cell (small cell at left), attacking a large cancer tumour cell. The T- lymphocyte, a white blood cell, must make intimate contact with the tumour cell. It does so by recognizing antigens on the tumour’s surface.Following contact the tumour cell undergoes distinct structural changes; loss of microvilli (small projections), perforation & ultimately death. The tumour cell may survive, however, by budding off a number of blebs or blisters (seen here), which form a protective barrier between itself & the lymphocyte, preventing any contact. Magnification: X 2,500 Credit: DR. ANDREJS LIEPINS/SCIENCE PHOTO LIBRARY
through Daily Anatomy

scienceyoucanlove:

This is an electron micrograph of a T-lymphocyte killer cell (small cell at left), attacking a large cancer tumour cell. The T- lymphocyte, a white blood cell, must make intimate contact with the tumour cell. It does so by recognizing antigens on the tumour’s surface.

Following contact the tumour cell undergoes distinct structural changes; loss of microvilli (small projections), perforation & ultimately death. The tumour cell may survive, however, by budding off a number of blebs or blisters (seen here), which form a protective barrier between itself & the lymphocyte, preventing any contact. 

Magnification: X 2,500 
Credit: DR. ANDREJS LIEPINS/SCIENCE PHOTO LIBRARY

through Daily Anatomy

science-junkie
fuckyeahfluiddynamics:

This infrared image shows a kilometer-high volcanic vortex swirling over the Bardarbunga eruption. The bright red at the bottom is lava escaping the fissure, whereas the yellow and white regions show rising hot gases. Although the vortex looks similar to a tornado, it is actually more like a dust devil or a so-called fire tornado. All three of these vortices are driven by a heat source near the ground that generates buoyant updrafts of air. As the hot gases rise, cooler air flows in to replace them. Any small vorticity in that ambient air gets amplified as it’s drawn to the center, the same way an ice skater spins faster when she pulls her arms in. With the right conditions, a vortex can form. Unlike a harmless dust devil, though, this vortex is likely filled with sulphur dioxide and volcanic ash and would pose a serious hazard to aviation.  (Image credit: Nicarnica Aviation; source video; via io9)

fuckyeahfluiddynamics:

This infrared image shows a kilometer-high volcanic vortex swirling over the Bardarbunga eruption. The bright red at the bottom is lava escaping the fissure, whereas the yellow and white regions show rising hot gases. Although the vortex looks similar to a tornado, it is actually more like a dust devil or a so-called fire tornado. All three of these vortices are driven by a heat source near the ground that generates buoyant updrafts of air. As the hot gases rise, cooler air flows in to replace them. Any small vorticity in that ambient air gets amplified as it’s drawn to the center, the same way an ice skater spins faster when she pulls her arms in. With the right conditions, a vortex can form. Unlike a harmless dust devil, though, this vortex is likely filled with sulphur dioxide and volcanic ash and would pose a serious hazard to aviation.  (Image credit: Nicarnica Aviation; source video; via io9)

thenewenlightenmentage
astronomicalwonders:

Spiral Galaxy NGC 1232
This spectacular image of the large spiral galaxy NGC 1232 was obtained on September 21, 1998, during a period of good observing conditions at the European Southern Observatory. The colors of the different regions are well visible : the central areas contain older stars of reddish color, while the spiral arms are populated by young, blue stars and many star-forming regions. Note the distorted companion galaxy on the top side, shaped like the greek letter “theta”.
NGC 1232 is located 20º south of the celestial equator, in the constellation Eridanus (The River). The distance is about 100 million light-years, but the excellent optical quality of the VLT and FORS allows us to see an incredible wealth of details. At the indicated distance, the edge of the field shown corresponds to about 200,000 light-years, or about twice the size of the Milky Way galaxy.
Credit: ESO/VLT

astronomicalwonders:

Spiral Galaxy NGC 1232

This spectacular image of the large spiral galaxy NGC 1232 was obtained on September 21, 1998, during a period of good observing conditions at the European Southern Observatory. The colors of the different regions are well visible : the central areas contain older stars of reddish color, while the spiral arms are populated by young, blue stars and many star-forming regions. Note the distorted companion galaxy on the top side, shaped like the greek letter “theta”.

NGC 1232 is located 20º south of the celestial equator, in the constellation Eridanus (The River). The distance is about 100 million light-years, but the excellent optical quality of the VLT and FORS allows us to see an incredible wealth of details. At the indicated distance, the edge of the field shown corresponds to about 200,000 light-years, or about twice the size of the Milky Way galaxy.

Credit: ESO/VLT

thenewenlightenmentage
thenewenlightenmentage:

Stringy fields may make the universe swell faster
DARK energy, the mysterious force thought to be responsible for the fact the universe’s expansion is accelerating, might come from a series of exotic fields. This notion, which has its origins in string theory, could explain why it was only after galaxies formed that the rate of expansion began to increase.
Dark energy could simply be a property of space-time, called the cosmological constant, which appears as a term added into the equations of general relativity. But, the trouble is that to make the equations balance, the constant should be 120 orders of magnitude larger than observations of the universe suggested it actually is.
Continue Reading

thenewenlightenmentage:

Stringy fields may make the universe swell faster

DARK energy, the mysterious force thought to be responsible for the fact the universe’s expansion is accelerating, might come from a series of exotic fields. This notion, which has its origins in string theory, could explain why it was only after galaxies formed that the rate of expansion began to increase.

Dark energy could simply be a property of space-time, called the cosmological constant, which appears as a term added into the equations of general relativity. But, the trouble is that to make the equations balance, the constant should be 120 orders of magnitude larger than observations of the universe suggested it actually is.

Continue Reading

science-junkie

startswithabang:

The Green Flash

"Given a clear path to the horizon — such as over the ocean — this means that there’s a slight region of space just above the reddened Sun where only the shorter wavelength light is visible!

And when that happens, in addition to the normal color gradient that comes with a sunset, you can also get a small, separate region above the disk of the Sun that appears yellow, green, or even blue! (And much fainter than the rest of the Sun!)”

During sunset, the Sun appears to redden, dim, and eventually sink below the horizon. Every once in a while, a rare phenomenon emerges along with it: a green flash, where a greenish-colored beam of light appears just over the Sun. What causes it? One of the most beautiful natural phenomena our planet has to offer, explained in glorious detail.