“I’ve noticed that I feel more inclined to ask the girls sitting next to me than the guys in class. My study group also consists of girls.
The girls in physics, at least the ones I’ve worked with, are often more ready to admit that it’s hard. Or maybe I’m not friends with too many physics guys.” #physics #steminist #womeninphysics #astrophysics #berkeleyphysics
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Damn the government is always trying to get my math smh
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Been a while since my last astro post, but here's an update on my progress through an Astrophysics degree. This is from the last class I have to take for the major!
What do we have here? It's a graphical representation of how a quantity called surface brightness varies with distance from the center of a galaxy. As astronomers, our most important measurements are always the intensity of light. For greatly extended objects like a galaxy, how much light is emmitted per surface area of the galaxy is the relevant quantity to determine: surface brightness (y axis). As we look at rings centered at the galactic core of ever increasing radius--x axis--we note that the light per surface area enclosed by that ring decreases. This is just the mathematical statement that galaxies are bright towards their centers and dimmer towards their edges--usually.
Empirical observations have found that the central bulge of a galaxy follows a different surface brightness profile as say the disk of a galaxy ( If you've ever seen a picture of Andromeda or the Milky Way, the bulge is the central bright region, and the disk is the part that contains the spiral arms. )
What I've plotted are those two very relations. The most notable feature here is that after a certain point--about 4 times the radius where half the light of the galaxy is enclosed--the light from the disc of the galaxy dominates over the bulge.
The formal names for each fit are called the deVacouluers Law, which is great for bulge profiles, and the disk component is best fit by an exponential function of an unspecified name.
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This telescopic snapshot records a cosmic moment in the tumultuous lives of large spiral galaxy NGC 3227 and smaller elliptical NGC 3226. Catching them in the middle of an ongoing gravitational dance, the sensitive imaging also follows faint tidal star streams flung from the galaxies in their repeated close encounters. Over 50 million light-years distant toward the constellation Leo, the pair's appearance has earned them the designation Arp 94 in the classic catalog of peculiar galaxies. But such galactic collisions and mergers are now thought to represent a normal course in the evolution of galaxies, including our own Milky Way. Spanning about 90,000 light-years, similar in size to the Milky Way, NGC 3227 is recognized as an active Seyfert galaxy with a central supermassive black hole.
Credit & Copyright: Ken Crawford (Rancho Del Sol Obs.) Collaboration: David Martinez-Delgado (MPIA, IAC), et al.
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: "A compilation of the most incredible images of our solar systems largest planet.
Storm systems the size of Earth rage within the atmosphere of the gas giant Jupiter. Hot gases that comprise Jupiter's atmosphere rise from lower levels to higher levels, and eddies form and converge. As cooler gas falls back, the Coriolis force causes swirling motions across a region. ≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈
Photo credit: JUNO, NASA
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