Fear not, the planet is not comatose – rather, researchers are now gathering data that shows Pluto’s
atmosphere is being blown back by the solar wind, much like the fragile
atmospheres of comets (called the coma – get it? I will not apologize).
Mars and Venus experience a similar loss of their atmospheres
to the power of solar radiation, due to the fact that they have no magnetic
field protecting the gases from the ferocity of the sun.
But not only does Pluto’s stretched atmosphere make it look
like tadpole, it even has the tail – made out of plasma, of all things! What
this means for Pluto is not yet entirely clear, but we can expect more updates
as data continues to come in over the next few months.
What would you do in a story with a planet that has a tail
made of plasma? Comment below!
This is it – a scientific game changer. Boy do we love
those. As soon as we get a little comfortable with a subject, the universe
presents an exception and calls everything into question. Then again, how well
can we say we really know black
holes?
Black holes fascinate me, perhaps because they are so
complicated, perhaps because the forces they exert are so incredibly powerful.
Nothing escapes the crushing force of a black hole, not light, not gravity, and
certainly not matter. They suck in and spin up such a disturbance that they are
the drain around which the matter of the universe floats. These pits of
darkness are everywhere – it is believed that they exist at the center of most
galaxies, and how many galaxies are in the universe? Well, a lot.
Black holes come in different sizes and rotate at different
speeds, giving us a wide variety of scenarios to observe. Each one has what is
called an “event horizon” – the boundary beyond which gravity becomes so strong
that satellite matter no longer orbits the black hole but falls into it. And
previously, there seemed to be some sort of sensible relationship between the
size of a black hole and its respective galaxy. But that may all change, since
a recent study that was meant to observe “normal” sized black holes has
accidentally discovered a black hole 7 billion times the size of our sun
residing at the center of a relatively average sized galaxy.
What does it mean????
How has this black hole not gobbled up everything in this puny little galaxy
already? Its mass is a tenth the size of all the matter that surrounds it.
Putting aside the mystery of the very existence of the galaxy, what kind of
amazing things could it be undergoing with the gravitational spin of a 7
billion sun black hole gnawing at its innards?
This week I read a short story (“A Galaxy Called Rome”) that
was written in the earlier, golden years of science fiction, and I found it interesting
that the author called what we know now as a black hole a “black galaxy.”
Perhaps this is Rome.
And here’s a nice little nugget of nostalgia for you – this week marked the anniversary of man’s historic landing on the moon. If you weren’t lucky enough to be a witness to the event back in 1969, fear not – Scientific American has you covered with a new, two minute compilation of the footage, from lift-off to landing to the safe return to Earth eight days later.
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