Heavens Above - Flybys, Marsquakes and Icy Craters

As a seasonal gift, NASA have made a downloadable  wrapping paper available - just the thing for that scale model of a Saturn V rocket...

Enough seasonal frivolity , what lurks in the Heavens Above ?
Like a stone skimming across the surface of a lake, the recent flyby of asteroid 2003 SD220 was a reminder of the vulnerability of our little home in space. It has already been pointed out that the one-mile long space-rock is a potential planet killer. Christened the 'hippo' asteroid by someone in JPL...I'm just surprised that it has not yet been likened to Oumuamua , or declared an alien scout ship...

Don't panic ! This was three years ago...recent flyby was only 1.8 million miles

...speaking of which, as we pass the shortest day of the year and head for Yuletide, we anticipate the New Years day encounter with ' Ultima Thule', the Kuiper belt object targeted by New Horizons since its Pluto flypast in 2015
As well as being the most distant flyby in our history, this is generating intrigue , due to anomalies regarding its lack of reflectivity - and (inevitably) the internet has arisen to the occasion with talk of it being an alien communications beacon, and other speculation born of fantastical fictions...
On the subject of distant neighbours in our solar system, a far flung contender has been discovered, with an orbit varying from 25 billion kilometers (from the sun) to a mere 3 billion, bringing it closer than Neptune. Not really big enough to be the ninth planet though...a place occupied by Pluto, IMO

This week saw the first firing of thrusters on the ESA/ Jaxa Beppi-Colombo mission to Mercury ...not a dramatic event  but a significant one, it allows tiny course corrections on its seven-year long journey ( the equivalent of being pulled by 250 ants, apparently) , so this is a very gentle journey, aiming to gather lots of science whilst approaching and orbiting Mercury in 2025.

Seismometer being placed on Mars       ESA

If you are impatient for science, don't forget that Insight just placed its Seismometer on Mars , and will begin relaying results of 'marsquakes' by the end of January 2019.

Korolev Crater   

The Mars Express Hi-Res Camera has recently imaged a crater filled with water ice, which is a permanent feature, a 'cold trap', with a depth of over a mile', and is comparable in volume to the Great Bear Lake in Canada (it says here...)

In a broader sense, though, the excitement of possible biological life on Mars is tempered by the Mars Trace Gas Orbiter, which has found no methane in the Mars atmosphere*...( personally, I think the subterranean martians must have a very advanced extractor fan - ahem )

* This appears to contradict earlier findings , so is not a definite statement


Here is a link to an animation detailing how to make a Dyson Sphere (well, you never know when you'll need to harness the power of the sun). As one commenter said, You Tube has come a long way from its early days of ' how-to-films' about making play-do...


On that note, have a very festive seasonal, and I'll see you on the other side !

TTFN


G