Aurora – Animal
An evening pause: Beautiful and haunting, but listen closely to these lyrics and you will hear our dark future singing.
Hat tip Lee Stevenson.
Tag: aurora
The aurora of Saturn
Cool movie time! Using the Hubble space telescope scientists have compiled an animation showing the changes in Saturn’s north pole aurora over time.
In 2017, over a period of seven months, the NASA/ESA Hubble Space Telescope took images of auroras above Saturn’s north pole region using the Space Telescope Imaging Spectrograph. The observations were taken before and after the Saturnian northern summer solstice. These conditions provided the best achievable viewing of the northern auroral region for Hubble.
…The images show a rich variety of emissions with highly variable localized features. The variability of the auroras is influenced by both the solar wind and the rapid rotation of Saturn, which lasts only about 11 hours. On top of this, the northern aurora displays two distinct peaks in brightness — at dawn and just before midnight. The latter peak, unreported before, seems specific to the interaction of the solar wind with the magnetosphere at Saturn’s solstice.
The animation of all the images is embedded below. At the link is a second video showing the aurora in close-up
Solar storm activates global aurora on Mars
The strong solar flare that occurred earlier this month was strong enough to activate a global aurora on Mars.
The solar event on Sept. 11, 2017 sparked a global aurora at Mars more than 25 times brighter than any previously seen by the MAVEN orbiter, which has been studying the Martian atmosphere’s interaction with the solar wind since 2014. It produced radiation levels on the surface more than double any previously measured by the Curiosity rover’s Radiation Assessment Detector, or RAD, since that mission’s landing in 2012. The high readings lasted more than two days.
Strangely, it occurred in conjunction with a spate of solar activity during what is usually a quiet period in the Sun’s 11-year sunspot and storm-activity cycle. This event was big enough to be detected at Earth too, even though Earth was on the opposite side of the Sun from Mars.
Hubble images Jupiter and its aurora
Cool image time! In anticipation of the arrival of Juno in orbit around Jupiter on July 4, scientists have released a spectacular image of Jupiter and its aurora, taken by the Hubble Space Telescope. The image on the right has been reduced slightly to fit on the webpage.
The main focus of the imaging is the aurora.
To highlight changes in the auroras, Hubble is observing Jupiter almost daily for several months. Using this series of far-ultraviolet images from Hubble’s Space Telescope Imaging Spectrograph, it is possible for scientists to create videos that demonstrate the movement of the vivid auroras, which cover areas bigger than the Earth.
Not only are the auroras huge in size, they are also hundreds of times more energetic than auroras on Earth. And, unlike those on Earth, they never cease. While on Earth the most intense auroras are caused by solar storms — when charged particles rain down on the upper atmosphere, excite gases, and cause them to glow red, green, and purple — Jupiter has an additional source for its auroras.
The strong magnetic field of the gas giant grabs charged particles from its surroundings. This includes not only the charged particles within the solar wind, but also the particles thrown into space by its orbiting moon Io, known for its numerous and large volcanos.
I have embedded below the fold one of the videos of the aurora, taken over time by Hubble. Quite amazing.
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Unexpected findings from Mars
The uncertainty of science: MAVEN has discovered both an unexpected dust cloud high in Mars’ atmosphere along with an aurora very deep down in the atmosphere, much deeper than expected.
The dust cloud, at around 90 miles elevation, is especially mysterious, as they have no idea how it got there.
The late arrival of Russia’s first private satellite
The competition heats up? The Dnepr rocket launch of 37 satellites yesterday also included the launch of the first private Russian satellite.
TabletSat-Aurura owned by the company SPUTNIX weighs 26.2 kg and is made to operate for one year. It is intended for remote Earth sensing in the interests of a private company. The satellite was made using Russian technologies and a minimum of foreign components. Its cost is about one million US dollars.
Igor Komarov, the head of the United Rocket and Space Corporation, said “the launch of Aurora, the first Russian private satellite, is a successful example of public-private partnership in the field of space exploration as private companies clearly cannot fulfill their strategic tasks without the state. ,,, I am confident that cooperation between the state and private aerospace agencies in designing and manufacturing high-tech craft will become an important stimulus for further development of Russian competitive technologies.”
SPUTNIX Director-General Andrei Potapov said his company’s plans included “creating a cluster of small spacecraft and craft for super high-definition aerial video surveying and imaging with a resolution of down to one meter per pixel”. [emphasis mine]
Why do I have doubts about this Russian achievement? The reasons are twofold.
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Polar Spirits
Commemorating the victims in Colorado.
Commemorating the victims in Colorado.
I don’t normally report on these violent events. However, I think Malkin’s point here is valid. Too much press has been given the mass murderer in this crime, and not enough for his innocent victims. And in order to understand the truly evil nature of this crime, it is important to know the kind of people this horrible man calmly killed. For example, “6-year-old Veronica Moser identified as Aurora shooting victim; mom in critical condition.”
A burst of aurora for reasons that are “unclear.”
In related Sun news: A burst of aurora this week for reasons that are “unclear.”
Possible aurora tonight
Tonight is the night to look at the sky, as the solar storm that hit the Earth today could produce spectacular aurora in lower latitudes.
The biggest solar storm to be aimed at the Earth in seven years is expected to reach us by Tuesday.
The biggest coronal mass ejection to be aimed at the Earth in seven years is expected to reach us by Tuesday.
No need to panic. Not only is the storm still relatively mild compared to past eruptions, the airline and electrical industries are actually well prepared for this event. However, if you want to see the aurora, this will probably be a good opportunity.
Saturn and Enceladus linked by electricity
Saturn and Enceladus linked by electricity.
Northern light show
That coronal mass ejection thrown out by the Sun on Sunday is expected to energize the aurora tonight and again on Thursday. Look up at night if you live in the high northern latitudes.