make sure you don't press that button.... |
Sometimes I
read things which are so utterly amazing that they cut through all of the day
to day grind, the happenstance and seemingly mundane nature of existence to
reawaken my youthful wonder and amazement at the universe. Sometimes the same
article can confirm that we as a species are bless with the ability to be
really fucking clever on occasion.
This
seeming innocuous article at the register here
about the latest observations of Eta
Carinea* is one such piece of writing. Basically ole Eta is far too big and far
too bright to be a stable star. During the 1840’s the star looked like it had
blown up and gone supernova but once the luminosity peak had passed the star
was still there. The Supernova imposter event was widely noted at the time but
since modern recording and analytics capability didn’t exist the event isn’t
very well understood. However some very clever sods at the Space Telescope
Science Institute realized that the light of the explosion could be reflected
of clouds of dust about one hundred light years from the star. They’ve managed
to capture enough of the reflected light to re-observe the event and determine the
temperature and spectrum of the explosion light and draw some fascinating conclusions
about it.
This is
clever stuff but for me it’s much more than just clever technique and great
thinking. It’s about using the sheer scale of the universe as a time machine. Using
a mirror nebula to look one hundred and seventy years into the past is amazing.
It reinforces the scale of the place we live in. it underlines that mathematics
and physics have a massive place in the universe. The concept of the Edington
limit has always fascinated me and here we have an object so luminous its own
brilliance is threatening to blow it apart and we have an example in our own
stellar backyard a “mere” 76,000,000,000,000,000 kilometers away. The universe
is a sodding big place and the old statement that it is defined not as being
stranger than we know but stranger than we can know has rarely felt more real.
“When you realize how perfect everything is you
will tilt your head back and laugh at the sky”--Prince Gautama
Siddharta, the founder of Buddhism, 563-483 B.C
* which is
a seriously large star about eight thousand light years or so away. It’s very
very very big, right up there at the top of current stellar models as a leader
of the big , heavy and bright class and when it goes bang, and it will, we’ll
have a light show of unparalleled magnitude**. Read about this luminous heavy weight here Eta Carinae wiki
** That or
be twatted in an instance if we’re staring down the barrel if it triggers a
gamma ray burst (read about that “micro scale” thing here Gamma-ray burst wiki)
this may have happened before, not caused by Eta Carinea of course, when one of
these bad boys kicks off there is very little left apart from a rapidly
spinning stellar black hole.
No comments:
Post a Comment