Showing posts with label ESA. Show all posts
Showing posts with label ESA. Show all posts

Friday, 24 March 2017

Tunnels on the Moon, Martian Landscapes, and the Storms of Jupiter

Investigations have revealed a network of tubes beneath the lunar surface , and arguments abound on whether to explore / inhabit them.
Personally, I think that moment has gone, as all eyes appear to be on Mars...speaking of which -

The diligent Mars explorer Curiosity still rumbles on, but is now showing signs of significant wear and tear on one of its wheels.
Fortunately we can view Mars from afar - this incredible animation was painstakingly pieced together from  available images.
Images from Hubble bring us two distant, interwoven galaxies
Juno is on its fifth Jovian flyby , with some  stunning results

Image from Juno , details here

Recent images from ESA show the many changes on comet 67P, indicating an active geology, surprising for a lump of icy rock in space..
I'm constantly impressed by the quality of images from space, and it's about to get better-
Nasa are working on a system of  ' broadband' for information packets from space.




 ESA have shared this , for those who might want to imagine themselves in the area of a black hole...




A Rant About The New Religion of Atheism

This week, I found myself debating atheism on social media, and being surprised at the arrogance on display -let's not forget that, when connected to the 'Big Bang' , atheism is nothing more than a faith - based belief system - i.e. you have faith that one day, someone will prove the theory.
I'm not impressed by the current wave of 'populism' , short on thinking and long on memes and soundbites, which allows people to parade half - truths as fact.
Ultimately, it harms the very mindset that claims to be advancing the 'clear light' of science,
and it smacks of  'the one true path ', a form of delusion which is normally found in religious zealots.
Science is meant to be a questing thing, a continual search for fact - based evidence, not an endgame.
For instance - has anyone actually managed to replicate a black hole under laboratory conditions ?
No ?
Their existence, then, is a matter of belief / faith...
The whole point of my rant (and thank you for bearing with me), is that quantum  mechanics looms larger by the day, bringing with it a whole new realm of chaos to upset science - from the very notion of 'entanglement' , which Einstein called ' spooky action at a distance', to a  theory that there was no big bang and the universe is eternal.
Regardless of its validity (further debate / testing needed) , it's a new idea, born of quantum science, not an extrapolation of extant physics.

'...nothing is written in stone.'                     pic:    Charlton Heston as Moses


I think the fractious, defensive noise we hear from some corners is insecurity - after all , there are people who have dedicated their lives to proving theories like the big bang.
Those who are genuinely curious either way, await the revelations from the James Webb telescope, which should be able to see as far back in space/time as the afterglow of the alleged Big Bang.
The telescope will be launched into orbit in October 2018.
At least until then, nothing is written in stone.
Including the Ten Commandments and the Big Bang Theory.*


G

* In this universe, it is equally true that The Big Bang Theory is a comedy show about a group of geeks , and The Ten Commandments  is a film by Cecil B DeMille.


Friday, 10 February 2017

Robotic Eels, Citizen Satellites, Sky Cranes and The Frozen Lakes Of Mars

Develop and fly your own cube satellite with help from ESA !
Okay, it's not open to individuals , but university groups with a good design , deadline is March 5th, 2017.
Hurrah for ESA !
Citizen Satellites can't be far away...maybe let's practice with drones first.
For the very ambitious, there is the competition to reach the moon and be first to return selfies.
Twenty million dollars for the winner !
The final contestants will begin launching this year !

Whilst I'm impressed that they have developed a chip that can survive the hellish temperatures of the surface of Venus, I can't help wondering why they are so focused on replicating a Curiosity-type rover - surely at such high temperatures a different style is called for
Why not have a hovering rover with extendable probe for surface samples.?
Or a completely separate autonomous drilling  unit ?
Would a drone be feasible , controlled by a remote signal from a satellite in the upper atmosphere ?

This is the problem with astro-physics - for all the compliments paid to the film Interstellar for its realistic depiction of a wormhole, has anyone actually been through one ?
Can a black hole be replicated under lab conditions ?
No, so everything is conjecture.
By the same token we are in danger of imposing limits on our own potential
There is the saying, that 'If it ain't broke, don't fix it.'; which is fine to an extent, but no-one ever pushed the envelope by staying in their comfort zone.
On re-reading this paragraph, I think it is unclear - what I'm trying to say is, let's get wild with spacecraft designs.
I don't want to lapse into business speak with ' blue- sky- thinking -outside- of -the-box', but here's an example of a box to think outside of...

Europa lander...   artist impression      NASA / JPL-Caltech

I'm not saying that landers should be aesthetically pleasing
And I understand that huge doses of radiation from Jupiter is a very real threat, so a shielded box is a smart thing,but...
But there's something - dull about it.
It's retro, but not in a good way.
Even the pareidolia of the robot 'head' looks naff.

STOP PRESS
Further reading tells me that the pictured lander is just an early prototype
It would drill beneath the surface , but only a few inches, as opposed to the miles of drilling needed to reach the ocean,
I stand corrected.
Further details
I'm still not convinced by the drilling theory - I hope further exploration might reveal a hidden shortcut, perhaps a deep gully / ravine, or better still, a system of caves.
My conjecture.

I remember reading of submarine probes based on the fact that any life on Europa is likely to be beneath the waters - even the recently developed robot - eels look appropriately ...alien.
I understand the practical necessity to assess land-based minerals for their extraction value, but are we not limiting our potential in exploration terms ?
Send in a couple of the very cool robotic eels.

There is an issue, of course - given the current attention paid to avoid contaminating potential water sources on Mars , why would we send technology into an alien ocean ?
Is it not running the risk of breaching the Outer Space Treaty ?



Mars continues to confuse.
Curiosity has ample evidence of lake beds which once were filled with fresh water , yet the lack of traceable co2 in the atmosphere suggests the water was always frozen, and never achieved a liquid state . Bizarre...


If you saw the film Gravity, then this picture probably resonates .
It's a photo from the first 'untethered'. spacewalk , showing Bruce McCandless
Not so futuristic after all - this picture is from 1984
Don't panic , he got back safely - phew !


Don't look down






Wednesday, 28 September 2016

Mars Landings, Space Utopia, and Nightmare Wasps


Ice on Mars

Simulation of Schiaparelli landing   ©ESA
 We are mere days away from the attempt by ESA / Roskosmos to break the NASA Mars exploration monopoly , with the two- part mission to identify the chemical makeup of the atmosphere.
The attempt will be aided by the orbiting Mars Express, with its instruments that were initially to designed to aid the ill - fated Beagle 2 lander.
Since 2003 , Mars Express has been orbiting and relaying priceless data , and will now help the dual- faceted Exomars mission in its final stages of entry /descent into the Martian atmosphere.
The mission is basically an attempt to prove whether there were conditions once favourable for life on Mars.
The Trace Gas Orbiter will remain in a low orbit around Mars, with Schiaparelli attempting a surface landing.
Schiaparelli is basically a laboratory,  not a  roving explorer, so sadly no companion for Curiosity .
Don't forget though, that Opportunity still roams the martian surface, collecting information.
It's all very functional , reducing the unknown to manageable levels of ' known' and understood - which is very necessary, at least in our own ' backyard ' , especially given the revelation that there are ten times as many galaxies in the heavens than previously thought.
The latest estimates peg the figure at two trillion galaxies.
I laugh at the thought of a team of lab- coated scierntists attempting to count every single one only to reach one trillion , 6 billion, 3million and 457,000 when someone interrupts and they have to start again.
Trivial, but it tickles me.
I'm assured however, that's not how it's done.
Still, let me just say that again-
Two trillion galaxies.
My attempt to rationalise such a huge number led me down another internet  rabbit hole.
A trillion is a milion million.
Which is a lot.
And that's the number of galaxies in the observable universe at least .
Galaxies, not stars.
There are possibly 400 billion stars in our own galaxy.
Which puts our little exploration of our neighbouring world in perspective.

Dione also contains water

In our own tiny corner of space, we have a solar system teeming with watery moons with subsurface oceans.
Recent data from the Saturn system explorer Cassini tells us that the moon Dione may also harbour an underground ocean , up to 40 miles deep: the deepest part of our own oceans is  a mere 7 miles / 9 km, or so.
It joins the growing list of  Enceladus, Europa, Ganymede , and the contentious planet / dwarf planet Pluto which all seem to contain large bodies of water

On another positive note, a new initiative is announced , with the purpose of creating a nation of space - dwellers who will colonise a giant orbiting craft known as Asgardia.
The ultimate goal is to democratise space, which sounds fine, but my concern is why choose a Nordic name then , thus firmly laying claim to a specific nationality and its own mythos ?
Just saying...

Speaking of which, space brain is a potential new danger for future human travellers to the outlying worlds...


On a final, uncomfortable, note:
A prehistoric nightmare wasp* somehow conflated in my mind with the news that a virus has been disovered that contains DNA from a mosquito
Nightmare fuel.

Megalara Garuda -These specimens are dead - phew !


*Obviously I checked further, to find any living descendants of the ancient ' nightmare wasp '.
This foolish internet quest led me to the Megalara Garuda wasp, discovered in Indonesia in 2011.
The fact that no-one lives on the island where it was discovered is not really surprising...