Here's another:
The
original Galaxy Zoo was launched in July 2007, with a data set made up of a million galaxies imaged with the robotic telescope of the
Sloan Digital Sky Survey. With so many galaxies, the team thought that it might take at least two years for visitors to the site to work through them all. Within 24 hours of launch, the site was receiving 70,000 classifications an hour, and more than 50 million classifications were received by the project during its first year, from almost 150,000 people.
Many projects are now underway using this data; you can read about the first few in our
list of papers published and
in progress, on the
Galaxy Zoo blog and below. We’ve been successful in getting time on professional telescopes to follow up many Galaxy Zoo discoveries, too; the list currently includes the
Isaac Newton and
William Herschel Telescopes on the island of La Palma in the Canaries,
Gemini South in Chile, the
WIYN telescope on
Kitt Peak, Arizona, the
IRAM radio telescope in Spain's Sierra Nevada,
the Swift and
GALEX satellites, and the
Hubble Space Telescope.
As the original Galaxy Zoo was the first time such a project had been attempted we were cautious, asking for fairly simple information about the appearance of the galaxies. Thanks to the overwhelming response we realized we could ask much more, so when we designed
Galaxy Zoo 2, we took 250,000 of the best and brightest of our original sample of galaxies and asked more detailed questions. Once again, we were thrilled with the response (although a little more prepared than we were for Zoo 1) and in the 14 months the site was up Galaxy Zoo 2 users helped us make over 60,000,000 classifications. Along the way we added in more detailed images, taken from a patch of the sky known as 'Stripe 82' which the Sloan telescope repeatedly visited. Taken together, the Galaxy Zoo 2 database is already enabling scientists to understand how galaxies - including our own - form and evolve.
More. . .