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takyon writes:

The construction of the 18-story, $1.4 billion Thirty-Meter Telescope atop the Mauna Kea volcano in Hawaii has been temporarily halted due to protests.

The campaign has garnered celebrity support and participants across the world:

Supporters of the project point out that there are already 13 telescopes built within that conservation zone. But none are as large as the latest planned structure, dubbed the Thirty-Meter Telescope, which would require the destruction of five acres of land.

The Honolulu-born Game of Thrones star Jason Momoa posted pictures on Instagram and Twitter using the hashtag #WeAreMaunaKea, That and the hashtag #ProtectMaunaKea have seen big jumps in use this week. San Francisco Giants' pitcher Madison Bumgarner, Pussycat Doll Nicole Scherzinger and Momoa's on-screen spouse, Emilia Clarke, and real-life partner, Lisa Bonet, also got involved.

Momoa's Instagram account is currently dedicated to the issue with a link to an online petition pasted as his status. The Instagram account @ProtectMaunakea also hosts pictures of hundreds of people who have posted signs in support of the conservation efforts. Organisers protested off social media as well by holding a worldwide sign waving with participants from Hawaii, Alaska, New York City, Las Vegas, Kentucky, Arizona, Tahiti and Tonga.

The Thirty-Meter Telecope's web site also has coverage.