The best description I can give
Would be that if you looked at new spring snow
Which has a fine grain size
About an hour after dawn or an hour before sunset
You'd see the same spectrum of light
That an alien astronomer in another galaxy would see
Looking at the Milky Way [more inside]
posted by thirteenkiller
on Jan 13, 2012 -
10 comments
"
The arc of the Milky Way seen from a truly dark location is part of our planet's natural heritage," said Connie Walker, and astronomer from the U.S. National Optical Astronomy Observatory in Tucson, Arizona. Yet "more than one fifth of the world population, two thirds of the U.S. population and
one half of the European Union population have already lost naked eye visibility of the
Milky Way." In these areas, people are effectively living in
perennial moonlight. They rarely realize it because they still experience the sky to be brighter under a full moon than under new moon conditions. "
Reducing the number of lights on at night could help conserve energy, protect wildlife and benefit human health," astronomer Malcolm Smith of the Cerro Tololo Inter-American Observatory in Chile. One study found an increased risk of breast cancer for women living in areas with the most light pollution (
abstract). Some communities are
embracing their dark skies, such as
the New Zealand community of Tekapo, possibly home to first "
Starlight Reserve," waiting on UNESCO's official approval. Not sure where to look
in the vast night sky?
Follow some guidelines, or
check the view in Chile,
Queensland, Australia, or
Texas.
posted by filthy light thief
on Jun 13, 2009 -
74 comments
A sixteen year long astronomical study, led by Dr. Reinhard Genzel of the Max-Planck-Institute for Extraterrestrial Physics, has provided what is considered to be the best empirical evidence yet of the existence of
supermassive black holes, specifically one a relatively cozy 27,000 light years away.... "The
stellar orbits [QT] in the
Galactic Centre [QT] show that the central mass concentration of four million solar masses must be a black hole,
beyond any reasonable
doubt."
[more inside]
posted by Kronos_to_Earth
on Dec 13, 2008 -
43 comments
Hubble harvests 100 new planets during a 7-day sweep of the bulge of the Milky Way.. If confirmed it would almost double the number of known planets to about 230. "I think this work has the potential to be
the most significant advance in discovering extra-solar planetary systems since the first planets were discovered in the mid-1990s."
posted by stbalbach
on Jul 1, 2004 -
17 comments
A computer aided simulation builds a spiral galaxy from
its beginning. In all, 390,000 particles were placed in an arrangement similar to a newborn galaxy. The end result after three months is an event that is believed to take billions of years to occur.
(animation)
posted by samsara
on Aug 7, 2002 -
7 comments
Power of Ten View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons.
posted by Tarrama
on Jan 30, 2002 -
19 comments
