Strictly Astronomy

Monster Telescope Takes Another Step Forward

The Council of the European Southern Observatory (ESO) today approved construction of the European Extremely Large Telescope (E-ELT)—which would be by far the biggest optical/infrared telescope in history.

(Artist rendition of the E-ELT.Credit: European Southern Observatory)

“Building huge telescopes is hard. Funding them is even harder, it seems.  But the project still faces obstacles, as several nations still need to confirm their contributions to the €1.1 billion ($1.35 billion) instrument.”

“At its previous meeting in December 2011, the ESO Council approved preparatory work on the project, including the construction of a road to the summit of Cerro Armazones in northern Chile, where the telescope will be located. But today’s vote was the first official approval of the full E-ELT program. In a press release, ESO Director General Tim de Zeeuw said, ‘This is … a great day for ESO.’”

“With a segmented primary mirror measuring 39.3 meters across, the E-ELT will collect more starlight than all existing professional telescopes combined and reveal 16 times more detail than the Hubble Space Telescope. Equipped with a suite of cameras, spectrographs and other instruments, the telescope is expected to detect the very first galaxies in the early universe; study the birth, evolution, and death of stars and planets; and directly image habitable planets orbiting other stars. It could be up and running in the early 2020s.”

“But here’s the small print: Of ESO’s 14 member states, just six (Austria, the Czech Republic, Germany, the Netherlands, Sweden, and Switzerland) voted to officially commit to the project, which will require them to increase their annual membership payments by 2%. Four countries—Denmark, France, Portugal, and Spain—’are not yet in a position to commit and need more time, so they abstained from voting,’ says ESO spokesperson Lars Lindberg Christensen. The representatives of the remaining four member states—Belgium, Finland, Italy, and the United Kingdom—voted yes, but their support still needs to be confirmed by their ministries or governments.”

“Despite the uncertainty, the E-ELT is in a better financial position than its two main competitors, the Giant Magellan Telescope and the Thirty Meter Telescope ’The question is no longer whether the E-ELT will start or not, but now it is just a question of the timescale for the start of the biggest contracts,’ says Lindberg Christensen.”

(It is likely that Europe will win the race to build the first 30-meter-class telescope, the E-ELT.  Their funding is essentially in the bank now, whereas the American competition is (1) only partially funded and (2) split between two competing projects.  Even though some construction work is underway on the American projects, both suffered a major blow at the start of the year when the National Science Foundation declined to provide significant funding for either project before 2020.  Some indications are that the organizations involved will consider foregoing public funding altogether, but fundraising US $1 billion isn’t easy.  I think it’s increasingly likely that neither American facility will get built unless the competing organizations set aside their differences and merge their operations.  -JCB)