It’s nice to see it worked out, back-of-the-envelope-style.
(via @jdwarren11 and @universetoday​ on Twitter)

"Always say less than necessary."

- Robert Greene (via kateoplis)

Exactly. #pasnormal #tdf #tourdefrance

The remarkable remains of a recent supernova

Scientists are getting a close-up X-ray view of G1.9+0.3, the most recent supernova known to have occurred in the Milky Way.
Astronomers estimate that a star explodes as a supernova in our galaxy on average about twice per century. In 2008, a team of scientists announced they discovered the remains of a supernova that is the most recent — in Earth’s timeframe — known to have occurred in the Milky Way. The explosion would have been visible from Earth a little more than a hundred years ago if it had not been heavily obscured by dust and gas. Its likely location is about 28,000 light-years from Earth near the center of the Milky Way. A long observation equivalent to more than 11 days of observations of its debris field, now known as the supernova remnant G1.9+0.3, with NASA’s Chandra X-ray Observatory is providing new details about this important event. The source of G1.9+0.3 was most likely a white dwarf star that underwent a thermonuclear detonation and was destroyed after merging with another white dwarf or pulling material from an orbiting companion star. This is a particular class of supernova explosions, known as type Ia, that are used as distance indicators in cosmology because they are so consistent in brightness and incredibly luminous. The explosion ejected stellar debris at high velocities, creating the supernova remnant that is seen today by Chandra and other telescopes. This new image is a composite from Chandra where low-energy X-rays are red, intermediate energies are green, and higher-energy ones are blue.

Full Article 
Credit: NASA/CXC/NCSU/K.Borkowski et al./DSS
#tourdefrance #fever

NBCSN showing some interesting footage of the tour through the last 100 years. Pictured here cyclists with spare tires in a figure-of-eight configuration over the shoulders.
How different the race looks today…

Ghent-Wevelgem 2013 by BrakeThrough http://flic.kr/p/eMsvMjVive le Vélo


Another important part of every big cycling event - Didi!
Hopefully we will see him in France,too (skipped last Tour)


Louison Bobet (on left) looking up the road at the 1949 edition of the tour

Charly Gaul

Earth and Moon seen by MESSENGER

This fantastic image shows the Earth and the Moon as seen from a distance of 114-million miles, or 183-million kilometers.
This picture, reminiscent of the famous ‘pale blue dot’ image captured by Voyager 1, shows our small-fragile world drifting through the vastness of space with its companion. MESSENGER, while exploring the region of space between the Earth and the Sun, turned its camera towards our special dot and sent back this snapshot of reality. For reference, the average Earth-Sun distance is about 93-million miles (150-million kilometers).

Image credit: NASA
The Rosette Nebula
Telescope: 106mm Takahashi
Image: A single Ha exposure, 600 seconds, stretched in Nebulosity and composited in Photoshop.