Showing posts with label Asteroid. Show all posts
Showing posts with label Asteroid. Show all posts

Monday, 10 June 2013

Opportunity rover on Mars

OPPORTUNITY THE MARVEL ROVER

As the current two Mars Rovers continue their work on Mars, back on Earth scientists huddle over computers looking at the amazing results of not the newest rover, but the nine year old Opportunity.

Opportunity is an amazing mission, achieving far more than its original programming or its builders ever hoped. Mars is such a hostile world, you have the cold, the low light levels which can starve Opportunity of power. You have of course the fine grain dust that squeezes into every component, hinge and joint plus of course the hostile Sun, without the protection of a magnetic shield the Rovers receive high doses of radiation every minute of their existence.

So considering all the hostile conditions it is amazing that Opportunity is still running nine years down the line after its bumpy pillow landing. Not only is that some magnificent achievement, but it is still finding and discovering rocks and deposits that make its younger rover cousin jealous.

We now have enough proof that not only did water run freely on the surface of Mars, but that it was not all acidic. It is likely as the planet aged and lost what little magnetic shield it had that the surface gradually became more hostile and the water more acidic. But the key, the most important discovery of all, Mars had drinkable water in its distant past.

With that knowledge, and with the knowledge that in the past when Mar's core was hot and volcano's still spat hot rock, that Mars could have and was likely to be the cradle of life.

Not just a cradle for itself, but it could well turn out in the next decade that not only did it cradle its own life, but it may well have been the cradle for all life in our Solar System.

If you look at the surface of Mars it is cratered with huge Stella impacts. It is these impacts that brought life to Earth. Two of these impacts created us and maybe created species two, Vumans. 

This is the premise of ORIGIN, a must read Vampire Science Fiction crossover that reboots the entire genre.






Saturday, 1 June 2013

Huge Asteroid just misses Earth


The 1998 QE2 Asteroid flew past us, winding it's way through our Solar System. This rock is so huge it has enough gravity to retain it's own satellite. 

3 Kilometres across, the spherical rock passed just 6 million kilometres away. If you want to know how close that is, well the Moon is 200,000 kilometres away. so around 29 times further out than the moon.

In space terms, that is close, close enough for Earth's Gravity to affect it's future path.

Do we need to worry about 1998 QE2, no not really, it has been known for a while and it's orbit does not put it at risk of hitting us. But the risk is objects of this size we do not know about yet.

An object 3 Kilometres across would be a species ending event. It would vaporise most surface life, kill most plant life. Only burrowing animals would be likely to survive if they had enough food to last the cold barren period.



Nasa simulation of asteroid path