Tuesday, December 12, 2017
News Roundup

Closing in on launch: NASA's gold-mirrored, $8 billion Webb Space Telescope (w/video)

Closing in on launch: NASA's gold-mirrored, $8 billion Webb Space Telescope

The world's most expensive telescope is parked for the moment in Greenbelt, Maryland, shrouded in a protective tent at the NASA Goddard Space Flight Center. In just two years, this long-delayed, $8 billion, cosmos-penetrating instrument is supposed to be nearly a million miles from Earth.

If it works, the James Webb Space Telescope will collect the oldest light in the universe, emitted soon after the big bang, when the first stars lit up and the first galaxies began to form. It will study black holes lurking at the center of galaxies. It will scrutinize the light from planets around distant stars and look for atmospheres you'd expect to see on worlds rioting with life.

But that's only after an epic journey. It's not a straight shot from the Washington suburbs to space.

The telescope first must be sealed in a climate-controlled container. Then, sometime in late March or early April, a truck will haul it very slowly and gently in the dead of night along a partially closed Capital Beltway. A lead car will watch for road obstacles and potholes.

Arriving at Joint Base Andrews, the Webb should slide, barely, into the cargo hold of a C-5C military transport plane.

Then comes a flight to Houston, to the NASA Johnson Space Center, where it will be tested in a vacuum chamber that will simulate the environment of deep space. From Houston it will be flown to Los Angeles, to a facility run by the project's primary contractor, Northrop Grumman, where it will be mated with its sunshield and navigational hardware.

Then comes a boat ride, one that will carry the telescope down the southwestern coast of North America and through the Panama Canal to French Guiana. That's where, in October 2018, it will be blasted into space atop a European Ariane rocket - a quarter-century after the Webb was conceived.

What could go wrong?

"It's wonderful and terrifying," says astronomer Heidi Hammel of the Association of Universities for Research in Astronomy, one of six scientists guaranteed observing time with the instrument. "The terrifying part comes because we know that this is rocket science for real, we are taking our fabulous telescope - it's a beautiful machine - and we're going to put it on a rocket ship and light the fuse."

Astronomers have a complicated and anguished relationship with the Webb. It's amazing. It's also wildly expensive. And it was supposed to be in space years ago.

John Mather, a Nobel laureate who is the senior project scientist, began working on it in 1995. He and his team had to achieve a long list of innovations to get the Webb built - things like the gold-covered mirrors, the sunshield and the means of keeping everything very cold.

"This job was just so hard, and when you're at the beginning you don't have the imagination to see how hard it is. No one had appreciated the difficulty of the test program," he said this week.

Cost overruns led to budget reviews, battles in Congress, near-death experiences, recrimination and, finally, to a reconfigured budget and timetable that lawmakers approved. The project devoured NASA money that might have gone to other science endeavors. It became known as the telescope that ate astronomy.

The Webb, which includes major contributions from the Canadian and European space agencies, has long been seen as the successor to the Hubble Space Telescope. The latter is still working fabulously but getting long in the tooth.

There have been rumors that the Trump administration could somehow gin up a Hubble repair mission with astronauts on a new shuttle-like spacecraft, but officials at NASA Goddard say they haven't been asked to plan for anything like that.

The Webb is quite different from the Hubble, starting with the fact that it's much bigger. The Hubble has a 2.4-meter mirror, but the Webb has 18 hexagonal mirrors that collectively are 6.5 meters - more than 21 feet - in diameter. It can collect seven times as much starlight.

The new telescope can observe the universe in infrared wavelengths of light that are inaccessible to the Hubble. In deep space, shaded from the sun, the Webb is designed to operate under extremely cold conditions. That's necessary for infrared astronomy because otherwise the heat from its instruments would block out the faint light from distant objects.

As things turned out, the Webb's problems with schedule may have been fortuitous.

The original goal was to look at very faint objects in deepest space - the very first stars and galaxies, so far away that their light, emitted about 13.7 billion years ago, is only now reaching our solar system. But the Webb may play a key role in the search for habitable worlds that are relatively nearby, orbiting stars in our own galactic neighborhood.

The very first "exoplanet" - a planet orbiting another star - was discovered 22 years ago, right about the time Mather began working on the Webb. Thousands of exoplanets have been found since.

Earlier this week, astronomers announced the remarkable discovery of a system with seven planets around a star named Trappist 1, some 39 light-years from Earth. Six of those planets are Earth-size. Several have orbits that might allow water, if present, to be liquid at the surface.

There's no way for the Webb or any other current telescope to see these planets directly, because they're too close to the parent star. But as they transit the star - passing across the face of the star as seen from the telescope - the starlight will dim slightly. That's how they were discovered.

An atmosphere around a planet will skew the wavelengths of the starlight. Astronomers can then use spectroscopy to discern which kinds of molecules make up the exoplanet atmosphere.

The Hubble has looked at the Trappist system and already has determined that the planets are probably rocky rather than gaseous like Jupiter or Saturn. But the Webb has sophistication the Hubble lacks. The Webb can detect the clear signatures of atmospheres containing water, ozone, oxygen, methane and other molecules. That could provide compelling evidence of a habitable planet.

As astrophysicist Michelle Thaller of NASA points out, while it wouldn't be the same thing as direct detection of life, it would be a major achievement for the still-young scientific field known as astrobiology.

Closer to home, the Webb's prime viewing targets include the Great Red Spot of Jupiter, Saturn's intriguing moon Titan, the dwarf planet Pluto and its moon Charon, plus the gaggle of "trans-Neptunian objects" way out in the exurbs of the solar system - little-known worlds such as Sedna, Quaoar and Makemake.

But first the telescope, which is supposed to begin observing in April 2019, has to function as planned. It would be hard to repair something parked at L2, the Webb's destination point in space, which is 930,000 miles from Earth on the opposite side of our planet from the sun.

"I can tell you that we're doing what we need to do to make sure that it'll work," Mather said. "You test. And test and test."

And look for potholes along the way - literally.

Comments
The Bucs’ problem isn’t how they finish; it’s how they start

The Bucs’ problem isn’t how they finish; it’s how they start

For the second straight week, the Buccaneers had the ball in the final minutes of a tie game.For the second straight week, they could not finish.As disappointing as that might be, they have a larger problem, and one that has existed all season: The B...
Updated: 3 hours ago
Shark-dragging video case ends with three arrests

Shark-dragging video case ends with three arrests

In what a state wildlife commission official called "a fairly unique case," investigators on Tuesday charged three men in connection with a viral video that showed anglers dragging a shark behind a boat on a rope.PREVIOUS COVERAGE: FWC identifies boa...
Updated: 8 minutes ago
Unexpected visit, gifts

Unexpected visit, gifts

GABRIELLA ANGOTTI-JONES | TimesFrancisco Cervantes, a kindergarten student at Wimauma Elementary School, high-fives Santa Jim on Tuesday while Ryan Sealy, Cervantes’ teacher, looks on. Amazon, which has a major distribution center in neighboring ...
Updated: 11 minutes ago
Nicko’s Fine Foods, classic diner and Seminole Heights icon, closes after six decades

Nicko’s Fine Foods, classic diner and Seminole Heights icon, closes after six decades

Nicko’s Fine Foods, known as the place Elvis Presley ate following a 1956 concert and Tampa’s last classic prefabricated diner, has shut down after more than 60 years in business.Owners Karen and Nicholas Liakos could not be reached for comment, but ...
Updated: 24 minutes ago

Tampa forum focuses on reforming Florida’s juvenile justice system

TAMPA — Changing the way Florida treats juvenile offenders was the focus of Monday night’s forum on criminal justice reform."We send more children to adult prison than any other state," said Raymer Maguire IV, manager of the ACLU’s Florida Campaign f...
Updated: 1 hour ago
Buchanan Middle aide used Instagram to seek nude photos, sex from students, deputies say

Buchanan Middle aide used Instagram to seek nude photos, sex from students, deputies say

TAMPA — A 24-year-old aide at Buchanan Middle School was arrested Monday and charged with using Instagram to ask for sex and nude photos from female students at the school, deputies said.Between Sept. 1 and the time of his arrest, Quinton J. Bradford...
Updated: 1 hour ago
New tracking system could help put a dent in juvenile car theft epidemic

New tracking system could help put a dent in juvenile car theft epidemic

LAKE MARY — Hundreds more juveniles who steal cars each year could be kept off the streets under a new tool approved by a Department of Juvenile Justice committee Tuesday, a move that could put a dent in a dangerous local car theft epidemic.Secretary...
Updated: 2 hours ago
Pinellas construction board prepares to lose independence

Pinellas construction board prepares to lose independence

LARGO — Members of the Pinellas County agency that oversees contractor licensing cried foul in January when elected officials sought to fold the board into county government.They were mostly quiet this week as they received word on plans to make that...
Updated: 2 hours ago
Tampa police looking for Plant City girl, 15, considered to be in danger

Tampa police looking for Plant City girl, 15, considered to be in danger

TAMPA — Police were searching Tuesday for a missing 15-year-old Plant City girl who disappeared from a Tampa girls school.Zoe Warren was last seen about 8 a.m. Monday at the PACE Center for Girls, 1933 E. Hillsborough Ave., where she attends school, ...
Updated: 2 hours ago
Defendant asks jurors: Do I look like Charles Manson?

Defendant asks jurors: Do I look like Charles Manson?

LARGO — Daniel Richards, on trial for the murder of his 83-year-old mother, began his own criminal defense on Tuesday by asking a few questions to the pool of prospective jurors."If you were accused of killing your mother, would you want to represent...
Updated: 2 hours ago