Astronomy news

Slam Dank

Jupiter is hit by between 6 or 7 large impacts each year on average according to a group of amateur astronomers from around the world - see http://phys.org/print382795886.html

wind and x-rays

At http://phys.org/print382011175.html ... a paper in May's issue of Nature concerns the discovery of intense winds found in the near neighbourhood of a black hole. It is capable of expelling material from the gravitational field around the black hole we are told, and seems to follow on from an outburst event after a long period of quiescence - 25 years. During the outburst brightness increased one million times and it temporarily became the brightest x-ray source in the sky.

Pluto behaving badly

At http://phys.org/print381597635.html ... Pluto's interaction with the solar wind is unique we are told. According to a study in the Journal of Geophysical Research - Space Physics (May 2016) Pluto behaves in a sort of halfway fashion between a comet and a planet when it encounters the plasma of the solar wind (the story is also at Daily Galaxy blog and Universe Today).

Planet Nine

Planet Nine is in the news again - a new paper in the Astrophysical Journal by Kenyon and Bradley (see http://phys.org/print381496454.html) that uses computer simulation to winkle out plausible scenarios. The presence of Planet Nine is yet to be determined but it does not stop people playing around on their computers. The most likely explanation, it seems, is that it formed a great distance away but was nudged by a 'passing star' and captured by the solar system, albeit on the outer side of the solar system (if it exists that is).

water and Mars

At http://phys.org/print381420139.html ... dark lines on slopes on Mars are created by water, it is claimed (very hot water).

At http://phys.org/print381396983.html ... NASA research (via observation and simulation) has been looking at swirling patterns of dark and light on the lunar surface. It seems they may be due to the magnetic field as a result of interaction with the solar wind.

At http://phys.org/print381400898.html ... oxygen and the universe. It is an important constituent of star making clouds of dust but it seems there is less of it than expected

Space Weather

At www.spaceweather.com (May 2nd 2016) - mysterious magnetic fields spark aurorae. For three days Earth has been moving through a region of space filled with negative polarity magnetic fields. This has caused geomagnetic storms

We also have sprites over the Caribbean (as seen from Texas) at the same web site. This is upper atmosphere lightning - going upwards (or connecting the ionosphere with the surface)

a rocky comet

At http://phys.org/print381157131.html ... a paper due out in May's Science Advances (2016) is set to claim C/2014 S3 PANSTARRS is an ancient rocky body - much like an asteroid. Comets are supposed to be icy conglomerates so is this really a comet or is it an asteroid behaving like a comet?

super flares

At https://tallbloke.wordpress.com/2016/04/28/evidence-of-solar-flares-bigg... ... refers to an article in April's Nature Communications (2016) and the possibility the Sun can produce super flares - one hundred times bigger than the Cinningham event in 1859.

See a video of the recent solar flare in action caught on video at www.space.com/32685-inside-the-heart-shaped-sunspot-plasma-s-magnetic-fl... ... a video of a big sun spot facing the Earth (from last week)

Einstein, lightning, and Mars

At http://phys.org/print380870251.html ... does lightning on other planets send radio signals to Earth? In this instance, radio signals from exo-planets.

At http://phys.org/print380860503.html ... Einstein's theory of general relativity is being put to the test by a newly launched satellite in a French experiment. In space it is possible to study the relative motion of two bodies in almost perfect and permanent free fall aboard an orbiting satellite - or that is the theory.

At http://phys.org/print380871684.html ... new images of the surface of Mars

Venus at the Poles

At http://phys.org/print380286576.html ... ESAs Venus Explorer sent back data just prior to plummeting down through its atmosphere. At the poles Venus is much colder that anywhere on Earth. Low altitude tests were carried out during the final months of the mission, taking the spacecraft deep enough to experience drag from the atmosphere. The spacecraft experienced deceleration as it probed into what was the layers of the upper atmosphere.

At http://phys.org/print380286831.html ... new images of craters on Ceres