✨The concept of black holes goes back to the 1780's when "dark stars" were envisioned✨
#Knowledge
👉 @LAQMC
#Knowledge
👉 @LAQMC
✨The nearest known black hole is 1,600 light years (10 quadrillion miles/16 quadrillion kilometers) away✨
#knowledge
👉 @LAQMC
#knowledge
👉 @LAQMC
✨A binary black holes have been found sitting in the center of quasar SDSS 153636.22+044127.0 at a distance of about 4 billion light years from Earth✨
#Knowledge
👉 @LAQMC
#Knowledge
👉 @LAQMC
✨The sun is not big enough to become a black hole, but if it did it would be 3.7 miles in diameter✨
#Knowledge
👉 @LAQMC
#Knowledge
👉 @LAQMC
✨Black holes come in three sizes: stellar mass, intermediate mass and supermassive✨
#Knowledge
👉 @LAQMC
#Knowledge
👉 @LAQMC
Though more famous for its huge storms, Jupiter isn't the only planet with large storms. In fact, Neptune has three major storms in its atmosphere. What are their names?
Anonymous Quiz
24%
A. Moe, Larry, Curly
12%
B. LS2, LS3, RF4
41%
C. Great Dark Spot, Small Dark Spot, Scooter
24%
D. Entropica, Titanica, N23
Galileo Galilei was the first to observe a satellite around any planet besides Earth when he used an early telescope in 1609-1610 to see Jupiter's moons. When we refer to the Galileian Moon or Moons, just how many are there?
Anonymous Quiz
17%
A. 1
18%
B. 2
36%
C. 3
29%
D. None of those choices
One of Venus's most distinct features is Maat Mons. Which of the following statements about Maat Mons is false?
Anonymous Quiz
29%
A. It is the largest volcano on Venus.
28%
B. It is named for the Roman goddess of fire.
23%
C. It rises approximately 5 miles from Venus's surface.
20%
D. There is evidence of recent volcanic activity.
Mars has no:
Anonymous Quiz
30%
A. Magnetic field
17%
B. Solid Core
37%
C. Atmosphere
16%
D. Volcanoes
What is it called when the Moon is directly between the Earth and the Sun?
Anonymous Quiz
44%
A. Lunar eclipse
48%
B. Solar eclipse
2%
C. Earth eclipse
5%
D. Jovian eclipse
Sol has now been burning hydrogen for almost five billion years. How much of its hydrogen has Sol burned since its first nuclear reaction?
Anonymous Quiz
30%
A. about one fifth
27%
B. about one third
19%
C. about one fourth
23%
D. about half
Before being named Makemake, the object was given the nickname Easter Bunny. Why was this?
Anonymous Quiz
18%
A. Its discoverer owned a pet bunny
43%
B. Thermal scans revealed a bunny shaped image on the surface
34%
C. It was discovered around Easter
5%
D. It was discovered on the vernal equinox
✨Matter spiraling into a black hole is torn apart and glows so brightly that it creates the brightest objects in the Universe – quasars✨
#Blackhole
👉 @LAQMC
#Blackhole
👉 @LAQMC
✨For black holes, distant observers will see only the outside of the event horizon, while individual observers falling into the black hole will experience quite another "reality." General relativity predicts that for distant observers outside the horizon, they will experience the three space-like coordinates and one time-like coordinate, as they always have. For someone falling into a black hole and crossing the horizon, this crossing is mathematically predicted to involve the transformation of your single time-like coordinate into a space-like coordinate, and your three space-like coordinates into three time-like coordinates. Along any of these three former space-like coordinates, they now all terminate on the singularity; you're experiencing them as time-like now. All choices always terminate on the singularity—at least in the case of a non-rotating black hole. The coordinate which used to measure external time now has a space-like character which affords you some wiggle room, but dynamically, in terms of these new reversed space and time coordinates, you find that no stable orbits about the singularity are possible no matter what you try to do. Without any stable orbits, and the inexorable freefall into the singularity, relativists often refer to this as the collapse of space-time geometry✨
#knowledge
👉 @LAQMC
#knowledge
👉 @LAQMC