Sunday, October 8, 2017
Saturday, October 7, 2017
Today's Astronomy Picture of the Day could be the last few seconds before the dinosaur killer hit, but is instead the recent solar eclipse in the sky over the Tate Geological Museum!
Friday, October 6, 2017
Today's Astronomy Picture of the Day shows the results of a solar storm around Mars. Astronauts on the surface would have experienced double the "normal" exposure to radiation during such an event. Did solar activity help to strip away the earlier atmosphere of Mars?
Thursday, October 5, 2017
Wednesday, October 4, 2017
Tuesday, October 3, 2017
Today's Astronomy Picture of the Day shows a ring around the star known as Fomalhaut. In a crazy sky of Dagon (a planet), dust disks and possibly more planets, comets and planetesimals add to a ring system that puts Saturn to shame.
Monday, October 2, 2017
Sunday, October 1, 2017
Saturday, September 30, 2017
Friday, September 29, 2017
Thursday, September 28, 2017
Wednesday, September 27, 2017
Tuesday, September 26, 2017
Today's Astronomy Picture of the Day brings us a parting gift. As it fell towards the end of its mission, the Cassini Orbiter snapped one final whole-ring image of Saturn.
I will miss that orbiter.
Monday, September 25, 2017
Today's Astronomy Picture of the Day depicts G79.29+0.46, brought to us courtesy of both ground and space-based telescopes. As the star throws off gas, it is painting a very pretty cosmic image.
Sunday, September 24, 2017
Saturday, September 23, 2017
Friday, September 22, 2017
Thursday, September 21, 2017
Today's Astronomy Picture of the Day brings us a dawn sky near Castle Vesprem in Hungary. As the sky brightens, several celestial objects (including the Moon) remain visible. "Mouseover" the image in the link for a guide.
Wednesday, September 20, 2017
Today's Astronomy Picture of the Day combines forty separate images to produce this view of our home star and our own moon during the recent eclipse, plus the corona and looping prominences of our quiet sun.
Tuesday, September 19, 2017
Today's Astronomy Picture of the Day is a classic image from the Hubble Space Telescope of the Veil Nebula. If this nebula were bright enough to be seen with your "naked" eye it would cover the sky larger than five full Moons. Imagine living under that sight!
Monday, September 18, 2017
Sunday, September 17, 2017
Saturday, September 16, 2017
Today's Astronomy Picture of the Day shows the last image transmitted by the Cassini Orbiter as it was deorbited into Saturn. The science continued during Cassini's final trajectory, lasting nearly sixty seconds after it was estimated the spacecraft would be unable to maintain communications with Earth.
Goodbye, Cassini. You were, possibly, the grandest of our grand explorations.
Friday, September 15, 2017
Right now, as I write this, the venerable hard-working Cassini Orbiter is plunging into the atmosphere of Saturn. This is being done to protect the moons of Saturn, or rather the potential life on the moons of Saturn (wouldn't want anything from Earth contaminating!).
The mission ran for 20 years, 13 of them in the Saturn system. Data from the mission will bring us discoveries for years to come.
It's strange to feel sad at the loss of a robot, but Cassini was more than a robot. It was a working representation of our desire to explore and learn.
Goodbye, Cassini. May we follow in your robotic footsteps soon.