NASA to launch X-ray telescope to scan Milky Way

June 13, 2012 07:08 pm | Updated 07:08 pm IST - LOS ANGELES

NASA is poised to launch its latest X-ray space telescope on a two-year hunt for hard-to-see objects lurking in the heart of the Milky Way and other galaxies.

The refrigerator-sized telescope was perched atop a rocket at a remote Pacific island launch site. On Wednesday, a carrier aircraft with the Pegasus XL rocket strapped underneath will take off from the Kwajalein Atoll, halfway between Hawaii and Australia. Upon its release, the rocket will free-fall for several seconds before igniting its engines for the climb into space.

The Nuclear Spectroscopic Telescope Array, or NuStar for short, focuses high-energy X-rays to peer through gas and dust in search of supermassive black holes in the center of galaxies, remnants of exploded stars and other exotic celestial objects.

While black holes are invisible, the region around them gives off telltale X-rays. NuStar will observe previously known black holes and map hidden ones. By exploring never-before-seen parts of the universe, scientists hope to better understand how galaxies form and evolve.

“We can view black holes and galaxies even if they’re enshrouded with dust and gas. If you had high-energy X-ray eyes and you stared up out of the galaxy, what you would see is the glow of all the massive black holes sprinkled throughout the cosmos,” chief scientist Fiona Harrison of the California Institute of Technology said this week.

NuStar will also hunt for the remains of ancient supernovae, stars that exploded in past centuries. If it’s lucky, it’ll witness a star’s death throes, but such events don’t happen often, and the telescope will have to be pointed in the right place at the right time.

Scientists expect sharp images from the mission, which is many times more sensitive than previous space telescopes that have looked in this part of the electromagnetic spectrum.

The $170 million mission was supposed to lift off in March but was delayed by a flight software issue with the rocket.

The launch comes at a trying time for NASA’s astrophysics division. Last week, the space agency killed an X—ray telescope mission because it failed to come in on budget. That mission called GEMS was supposed to launch in 2014 and would have observed many of the same targets as NuStar.

NASA is pressing ahead with its flagship astrophysics mission the budget-busting James Webb Space Telescope considered the successor to the Hubble Space Telescope with the capability of peering deeper into the universe and back in time than ever. It’s now expected to launch in 2018 at an $8 billion price tag.

0 / 0
Sign in to unlock member-only benefits!
  • Access 10 free stories every month
  • Save stories to read later
  • Access to comment on every story
  • Sign-up/manage your newsletter subscriptions with a single click
  • Get notified by email for early access to discounts & offers on our products
Sign in

Comments

Comments have to be in English, and in full sentences. They cannot be abusive or personal. Please abide by our community guidelines for posting your comments.

We have migrated to a new commenting platform. If you are already a registered user of The Hindu and logged in, you may continue to engage with our articles. If you do not have an account please register and login to post comments. Users can access their older comments by logging into their accounts on Vuukle.