Astronomy news

glaciers on Mars, seasons on the Sun

At http://phys.org/print347613455.html ... Mars not only has polar ice caps but has glaciers elsewhere too - in both hemispheres. These glaciers have until now been obscured by a thick layer of surface dust - but they are made up of frozen water. Eureka - water on Mars. The paper was published in Geophysical Research Letters.

At http://phys.org/print347561594.html ... the Sun is subject to seasonal variability with activity waxing and waning over a period of two years - according to a paper in Nature Communications this week.

Velikovskian orbits, radio oddities

Tim Cullen has been his usual self - questioning the group think of consensus science. One of his posts as been re-published at Tall Bloke's Talk Shop - go to http://tallbloke.wordpress.com/2015/04/08/tim-cullen-planetary-axial-til...

Wonderful

How is this beauty? At http://phys.org/print347616080.html ... this picture was taken over an Icelandic lake with a curtain like aurora arching across the sky - and reflected in the water. It was generated by a CME that occurred on the 15th March, seen by a flotilla of spaceships including the SOHO observatory. Millions of tons of magnetically charged particles were blasted into space

Rosetta getting bashed

At http://phys.org/print347187952.html ... the Rosetta saga continues - it has now experienced significant buffeting and difficulties over controls as Rosetta swoops low across comet Churyumov-Gerasimenko, so much so that such close encounters may have to be curtailed in the future. It encountered a dense outflow of gases and dust particles that temporary caused scientists on earth to lose control of the spaceship.

See also the mission web site - and the link http://sci.esa.int/where_is_rosetta/

dreaming of the big wave on Mars

At www.space.com/28983-ancient-mars-oceans-big-waves.html .... as it has been repeated now on many occasions the assumption is growing strength in the idea that Mars once harboured an ocean - suitably way back in the early universe. Once you come to accept there was once plentiful supply of water on the red planet, and a big ocean, you can conjure up almost anything - especially if you create a model.

lava tubes on the moon

Another interesting post from www.space.com/28894-moon-lava-tubes-underground-cities.html .... no, not a reference to cities already on the moon, hiding in cavities and lava tubes, but the prospect of earthlings colonising the moon and finding somewhere safe to set up camp. Speculation is that theoretically lava tubes could exist on the moon over half a mile in width, big enough to harbour a lunar colony. They are pictured as offering a refuge from cosmic radiation, meteors, and temperature fluctuations. Sounds quite reasonable when you digest the whole story.

Tails of the Moon

At www.newscientist.com/article/dn27275-thye-moons-got-two-tails-and its-friends-might-too.html .... member Gary Gilligan sent in this piece he spotted at New Scientist this week. The Moon has got two tails. One is a tail of sodium gas that streams behind the Moon as she moves. The other is a tail of dust particles. Both stretch for hundreds of thousands of kilometres in the wake of the Moon.

Gary, of course, has his own views on the tails - visit www.gks.uk.com/Ram-headed-Amun/

lakes on Mars and warm layers on Venus

At http://phys.org/print346519189.html ... the search for water continues. We now have former lakes in craters - and two episodes of water related activity on Mars.

At http://phys.org/print346509807.html ... scientists say they have found a warm layer in the atmosphere of Venus - and they are talking about 20 to 40 degrees warmer than expected. This is not to be sniffed at as CAGW alarmists on Earth are thinking just 2 degrees is apocalyptic.

black holes blowing out a storm

A study published in the journal Nature shows observational evidence that a supermassive black hole at the heart of a huge galaxy can power huge molecular outflows. They are actually emitting, they claim, massive quantities of star making gases - see http://phys.org/print346488389.html