THE COLD CONTINUES. Another cold, mainly sunny, low to moderate winds with a high of -19C day today. Currently we have a few clouds, a temperature of -23C with no windchill, and our winds are currently calm there for no windchill.
There are NO weather and NO marine wind warnings for our area at this time.
Our highways in and around our area continue to be in GOOD winter driving conditions. PLEASE plan ahead for winter driving.
HAVE A GREAT TUESDAY!
CURRENT HIGHWAY CONDITIONS
Galaxy NGC 474: Shells and Star Streams
Image Credit: CFHT, Coelum, MegaCam, J.-C. Cuillandre (CFHT) & G. A. Anselmi (Coelum)Explanation:
What’s happening to galaxy NGC 474? The multiple layers of emission appear strangely complex and unexpected given the relatively featureless appearance of the elliptical galaxy
in less deep images. The cause of the shells is currently unknown, but possibly tidal tails
related to debris left over from absorbing numerous small galaxies in the past billion years. Alternatively the shells
may be like ripples in a pond, where the ongoing collision with the spiral galaxy just above NGC 474
is causing density waves
to ripple through the galactic giant. Regardless of the actual cause, the featured image
dramatically highlights the increasing consensus that at least some elliptical galaxies
have formed in the recent past, and that the outer halos of most large galaxies
are not really smooth but have complexities induced by frequent interactions
with — and accretions of — smaller nearby galaxies
. The halo of our own Milky Way Galaxy
of such unexpected complexity
. NGC 474 spans about 250,000 light years
and lies about 100 million light years distant toward the constellation of the Fish (Pisces
Tomorrow’s picture: open space