Communion Of Dreams


“Shields holding, Captain.”

Unsurprisingly, this has been making the rounds among my friends:

I say “unsurprisingly” because a lot of my friends are reacting to yesterday’s well-documented meteor explosion in the Ural mountains (Russia), and today’s near-pass of a much larger body:

As noted in the various science stories, 2012 DA14 is about 150 feet in diameter, and would have about the same effect were it to hit the Earth as Meteor Crater, depending on the exact composition, speed and angle of approach of the meteor. If you want to play with the variables, here’s a simulator I’ve had fun playing with in the past Impact: Earth!

On one end of the range of effects would be just another bright light in the sky, as the thing exploded in the upper atmosphere. On the other end, another mile-wide crater where a city used to be. Fun, eh? And remember – 2012 DA14 was just discovered last year, and then by pure chance. There are any number of such potential threats out in space. As the Washington Post puts it:

For the foreseeable future, then, Earth will continue to reside in a cosmic shooting gallery with an enormous number of currently unknown objects, some of which may have a direct bead on us without our knowing. While it is probably much more unlikely than likely, a potentially disastrous collision with an asteroid of at least the dimensions comparable to DA14 could occur anytime possibly with little or no warning in our lifetimes.

Keep your fingers crossed that our luck — and our atmospheric ‘shields’ — continue to hold until we no longer have all of our eggs in this particular basket.

 

Jim Downey

 

Advertisements

Leave a Comment so far
Leave a comment



Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s



%d bloggers like this: