Monecky - Grandes Sonhos
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The image shows an intensely bright “ring of fire”, as Prof Falcke describes it, surrounding a perfectly circular dark hole. The bright halo is caused by superheated gas falling into the hole. The light is brighter than all the billions of other stars in the galaxy combined - which is why it can be seen at such distance from Earth.
this is one of those things that hurts my brain to even attempt to wrap my head around
“What we see is larger than the size of our entire Solar System,"
How do you even mentally process that kind of scope? it’s ridiculously and awesome
Jupiter and the Moons via NASA https://ift.tt/31QTY9y
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Images of Jupiter taken by JunoCam on NASA’s Juno spacecraft.
Credit: NASA, JPL-Caltech, Mission Juno, Jason Major, Luca Fornaciari, Gerald Eichstädt
On that day in 1957 was launched the satellite Sputnik 1, the Earth’s first artificial satellite.
The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957, orbiting for three weeks before its batteries died, then silently for two more months before falling back into the atmosphere. It was a 58 cm (23 in) diameter polished metal sphere, with four external radio antennas to broadcast radio pulses. Its radio signal was easily detectable even by radio amateurs and the 65° inclination and duration of its orbit made its flight path cover virtually the entire inhabited Earth. This surprise success precipitated the American Sputnik crisis and triggered the Space Race, a part of the Cold War. The launch ushered in new political, military, technological, and scientific developments.
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Falling Away from Jupiter. This image of Jupiter’s southern hemisphere was captured during my flyby of the gas giant planet on Dec. 16, 2017.
Interstellar Comet 2I/Borisov Probably Came from Double Red Dwarf Kruger 60
A new study by astronomers from the A. Mickiewicz University and the Space Research Centre of the Polish Academy of Sciences suggests that the interstellar comet 2I/Borisov likely came from a binary star system called Kruger 60.
is a visual binary stellar system located in the constellation of Cepheus.
Also known as DO Cephei, HD 239960, Gliese 860, BD+56 2783, HIP 110893, and ADS 15972, it is a tenth closest multiple stellar system, currently only 13.15 light-years from the Sun and approaching.
Kruger 60 is named after the German astronomer Adalbert Kruger who observed it in 1873.
It consists of two M-type stars (red dwarfs) — Kruger 60A and B — that orbit each other once every 44.6 years.
Kruger 60A has about 27% of the Sun’s mass and 35% of the solar radius, Kruger 60B is a smaller star with about 18% of the Sun’s mass and 24% of the solar radius.
They modeled the motion of the comet, the Sun and 647 stellar systems from their list of potential perturbers of cometary motion.
They found that one million years ago, 2I/Borisov passed Kruger 60 at a distance of 5.7 light-years having an extremely small relative velocity of 7,700 mph (3.43 km/s).
“As the orbit of this comet will become more precise the minimal distance between these two bodies might vary but their relative velocity will remain very small, which suggests that 2I/Borisov might originate from Kruger 60,” the researchers said. (source)
