#hdst

“They don’t make tombstones for stray dogs”

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New Space Telescope, 40 Times The Power Of Hubble, To Unlock Astronomy's Future

“But these potential discoveries are what we know we're going to be looking for. With every new major technological leap forward we've ever taken in astronomy and astrophysics, the greatest achievements of all have been the ones we could not have anticipated in advance. The great unknowns of the Universe, including what it looks like in the faintest regimes, how the most distant stars, galaxies, gas clouds, and the intergalactic medium behaved at early times, and what it looks like beyond anything we've ever seen will all be exposed for the first time. It's possible that we'll learn we were quite arrogant and wrongheaded in a great multitude of arenas, but we'll need this new, high-quality data to show us the way.”

If you were an observational astronomer, what would your dream telescope look like? It would have to be huge, with an incredible amount of light-gathering power. The quality of the optics would have to be pristine, and higher-precision than anything ever created before. It would have to have multispectral capabilities, extending beyond both sides of the visible light spectrum. And it would have to be in space, with no interference from our atmosphere. If we could build a telescope like that, so many things would immediately become possible. We’d be able to directly image perhaps 100 exo-Earths around nearby stars, including spectra of their atmospheres. We’d take images of Jupiter of the same quality that JUNO can, but from Earth’s orbit. We’d be able to measure the star clusters inside and gas halos surrounding every galaxy in the Universe to just a few hundred light year-precision. And we’d be able to take high-resolution images of the faintest, most distant galaxies of all, in just a tiny fraction of the time it’s taken Hubble to do it.

Alle 18 hoofdspiegels van de James Watt Space Telescope (JWST), de opvolger van de sinds 1990 actieve Hubble Space Telescope (HST), zijn bevestigd op het raamwerk van de telescoop. De van beryllium gemaakte spiegels, voorzien van een coating van goud, zijn met zeer nauwkeurige precisie in dat raamwerk getild en geplaatst door een robotarm, die de ‘Primary Mirror Alignment and Integration Fixture’ wordt genoemd. Hierboven zie je hoe die robotarm één van de hexagonale spiegels op z’n plaats zet. Hieronder een video van Scientific American over de JWST, de volgende-generatie-ruimtetelescoop, welke in oktober 2018 met een Europese Ariane V raket zal worden gelanceerd.

OK, vanaf eind 2018 gaat die JWST de ruimte in, om vanaf Lagrangepunt L2, anderhalf miljoen km verwijderd van de aarde, onderzoek te doen aan de verste en vroegste sterrenstelsels in het heelal. De Hubble ruimtetelescoop kan dan met pensioen. En daarna, als de JWST na zoveel jaar op is en met pensioen gaat? Dan krijgen we de High-Definition Space Telescope (HDST). :-D:bron: Bron: NASA.

Spazio: C’è qualcuno là fuori? Potrebbe dircelo HDST

Ecco come HDST vedrebbe un sistema solare gemello del nostro situato a 45 anni luce di distanza. Crediti: L. Pueyo e M. N’Diaye / STScI

Prendete un gruppo d’astronomi fra i più quotati degli Stati Uniti. Metteteli attorno a un tavolo. E chiedetegli di progettare il telescopio dei loro sogni. È più o meno quello che ha fatto l’AURA, l’Association of Universities for Research in Astronomy. Il…

In a meeting today at the American Museum of Natural History, members of the Association of Universities for Research in Astronomy (AURA) presented a roadmap to a powerful space observatory that would allow for greater exploration of planets outside of our solar system, including signs of life.

At its heart is AURA’s vision for a High-Definition Space Telescope (HDST), described by some as a “super-Hubble,”that could improve on that storied telescope’s capabilities by a factor of more than 100. The HDST would be the centerpiece of a space observatory that would also host a suite of specialized instruments, including coronagraphs that can block light from stars and allow astronomers to glimpse nearby objects such as exoplanets.

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