Scientists find first evidence that black holes are the source of dark energy
Observations of supermassive black holes at the centers of galaxies point to a likely source of dark energy—the 'missing' 70% of the universe.
The Space Thread
- Thread starter Gomez Adams
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Aurora Borealis Forecast. Everything You Need to know.
Aurora Borealis Forecast, includes immediate, real time info on Northern Lights viewing, including Aurora Alerts
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Used to see it a lot in Edmonton. Also got good views in northern Europe when I was there on ops. With this flare you need to check the forecaster. It may be strong enough to be seen that far south
CONFIRMED: A CME IS COMING: Yesterday's X2.2-class solar flare (described below) produced a CME, and it has an Earth-directed component. Coronagraphs onboard the Solar and Heliospheric Observatory (SOHO) recorded a lopsided halo emerging from the blast site:
The flank of the CME will probably strike Earth on Feb. 20th. Geomagnetic storms ranging from category G1 (Minor) to G3 (Strong) are possible after the CME arrives. NOAA analysts are currently modeling the CME's internal structure and trajectory. Refinements to this forecast may be made, depending on their results.
STRONG X2-CLASS SOLAR FLARE (UPDATED): New sunspot AR3229 erupted on Feb. 17th (2016 UT), producing a strong X2.2-class solar flare. NASA's Solar Dynamics Observatory (SDO) recorded the extreme ultraviolet pulse:
Radiation from the flare ionized the top of Earth's atmosphere, causing a deep shortwave radio blackout over the Americas. Mariners, aviators and ham radio operators may have noticed loss of signal and other unusual propagation efftects at frequencies below 30 MHz for more than an hour after the flare.
The long-duration flare also launched a solar tsunami. It is the shadowy shock wave in this 193 angstrom movie from SDO:
The US Air Force has reported a Type II solar radio burst coming from the tsunami. The drift rate of the burst suggests a shock speed greater than 2400 km/s (5.4 million mph). Solar tsunamis and Type II radio bursts are closely linked to CMEs, and we should expect to see one soon emerging from the blast site.
Update: The CME has emerged, and it has an Earth-directed component. ETA: Feb. 20th. Geomagnetic storms ranging from category G1 (Minor) to G3 (Strong) are possible after the CME arrives.
The flank of the CME will probably strike Earth on Feb. 20th. Geomagnetic storms ranging from category G1 (Minor) to G3 (Strong) are possible after the CME arrives. NOAA analysts are currently modeling the CME's internal structure and trajectory. Refinements to this forecast may be made, depending on their results.
STRONG X2-CLASS SOLAR FLARE (UPDATED): New sunspot AR3229 erupted on Feb. 17th (2016 UT), producing a strong X2.2-class solar flare. NASA's Solar Dynamics Observatory (SDO) recorded the extreme ultraviolet pulse:
Radiation from the flare ionized the top of Earth's atmosphere, causing a deep shortwave radio blackout over the Americas. Mariners, aviators and ham radio operators may have noticed loss of signal and other unusual propagation efftects at frequencies below 30 MHz for more than an hour after the flare.
The long-duration flare also launched a solar tsunami. It is the shadowy shock wave in this 193 angstrom movie from SDO:
The US Air Force has reported a Type II solar radio burst coming from the tsunami. The drift rate of the burst suggests a shock speed greater than 2400 km/s (5.4 million mph). Solar tsunamis and Type II radio bursts are closely linked to CMEs, and we should expect to see one soon emerging from the blast site.
Update: The CME has emerged, and it has an Earth-directed component. ETA: Feb. 20th. Geomagnetic storms ranging from category G1 (Minor) to G3 (Strong) are possible after the CME arrives.
Mars on the left. Earth on the right.
Jezero Crater (Left; Credit: NASA/JPL-Caltech) and Red Stone Jurassic fossil delta of the Atacama Desert in northwestern Chile (Right; Credit: Dr. Armando Azua-Bustos)
Jezero Crater (Left; Credit: NASA/JPL-Caltech) and Red Stone Jurassic fossil delta of the Atacama Desert in northwestern Chile (Right; Credit: Dr. Armando Azua-Bustos)
Second Gentleman. First time I've heard the term. I instantly guessed who they were referring to. Good to hear about Artemis. I had heard some talk of the heat shield but nothing seems to have come about.
It lost more material than they predicted it would. Nothing was harmed because of it, but NASA doesn't like ANYTHING working out even a micron from where they predicted.
I'm sure they'll figure out the cause and fix it.
Note Mar 25th. DZ2 54m in diameter it is just over 177ft. Passing by at 0.5 LD (Lunar Distance) puts it at just under 120,000 mi. Moving at 17,000 mph.