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Marc Brandsma
Works at Schibsted Growth
Attended University of Chicago
Lives in Paris, France
1,550 followers|9,317 views
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Marc Brandsma

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vas-y roger, saute dans le couloir
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Marc Brandsma

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How many spy satellites will be shot by the asteroid?
 
Close Encounters

A 50 meter rock is heading straight for us. On February 15, it will miss us by a hair's breadth in cosmic terms, coming within 3 Earth radii.  At its nearest approach it will be closer to the Earth than a geosynchronous satellite.  It will pass through the spot Earth was just 20 minutes earlier.  While that sounds like a dangerous close call, it poses no risk to us.  While this particular rock will get fairly close, it will still miss us entirely.  

Close approach asteroids such as this one are not uncommon.  Most of them don't get closer than the moon, but when one does it generally makes the rounds in the news.  So far none of them have had any chance of hitting Earth.  That doesn't mean the chance is always zero.  Asteroids have struck Earth throughout its geologic history, and some (such as the 10km one that struck 66 million years ago) even cause mass extinctions.  

Fortunately NASA has a list of possible impact objects (http://goo.gl/BpjQG), so you can check up on your risk of death by asteroid.  There is also a risk scale known as the Torino scale.  It summarizes the risk as a number from 0 - 10 based on the object's size and  chance of impact within the next century.  At 0 the risk is non-existent, while at 10 it's up to Bruce Willis to save us.  The highest any object has ever rated on the scale is 4.  This was for a 400 meter asteroid known as Apophis with an estimated 1 in 42 chance of hitting Earth.  It was downgraded to level 1 a couple of years after its discovery, and has since been downgraded again to 0.  

So no risk this time, nor in the foreseeable future.  Just one more close encounter.
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The evolution in the Dark Energy Universe 
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Bravo
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Google+ se normalise. On y trouve de plus en plus souvent des posts crétins, vides, irritants et repostés mécaniquement par des abrutis. La civilisation avance.
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Belle exemple !
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Marc Brandsma

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Goosebery Falls by WeAre Grandbarbu on Pinterest
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Great guy!
 
Thursday Nov. 8th, don't miss the Rude Baguette's 1st Google+ On-Air Hangout with Allymapps CEO Thibauld Favre! http://ow.ly/f1faT
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Best pitching & networking event for startups. Once again in Paris. Apply now if you want to get a chance to be selected for the Seedcamp program and have quite valuable feedback from mentors.
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The question is no longer to know if we will collectively succeed in addressing the energy, demographic, environmental and economic challenges that converge upon our heads (I take it for granted given what we see and what we've done in the past, that we will not), but what will happen then. Brutal collapse? Long and painful decay? Retreat of the elites against the people? There are many scenarios but they're all very unpleasant.
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+Alan Mimms I saw a great talk on TED about wireless power and how houses could be little power stations in the future so its a possibility but I still think the oil companies would try to buy the technology and let it gather dust so we keep using oil etc, but if people come together there is absolutely nothing we couldn't achieve.
I try to stay optimistic but its difficult knowing what these people at the top are like.

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Shortage of water in the heart of Europe. This is a message from our future. If we don't seriously manage our water supplies, this may happen on a far larger scale. And if the whole Europe happens to lack clean water, there will be nobody to send tankers.
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Another example of how the old world of privileges, cronyism, has a hard time adjusting to the new rules.
In France, the salaries of the top 10 executives of SACEM, the organization that collects money rights for artists, exceeds the total amount of money they get from iTunes sales.
No wonder that all these old guys do not want to understand that their world is changing fast.
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Have him in circles
1,550 people
Jean-Luc Leleu's profile photo
Antonio Cezar de Carvalho's profile photo
Work
Occupation
I buy startups for a living. Really.
Skills
None.
Employment
  • Schibsted Growth
    Managing Director, 2013 - present
  • Chausson Finance
    2005 - 2013
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
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Paris, France
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Lead Procrastinator
Education
  • University of Chicago
  • Paris Dauphine University
  • Sup de Co Rouen
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