NASA Goddard:Webb Move from Houston to LA

NASA Engineer Profiles Goddard Space Flight Center - large STEM facility manages multiple lines of inquiry

NASA Goddard Space Flight Center in Greenbelt,Maryland is one of America's primary space science centres,involved in the management of  research programmes carried out by a variety of space probes,especially those in Earth orbit or perhaps as far out as the Moon or Mars-the Jet Propulsion Laboratory in Pasadena,California handles probes to the outer planets and beyond.Larry Mignosa,a Mechanical Engineer at Goddard for 25 years,gave a broad overview of the facility and its lines of inquiry to a small audience of STEM enthusiasts at the C.Burr Artz Library in Frederick,Maryland,which has positioned itself as a STEM education center.He was educated as a civil engineer,but that discipline comes under the mechanical engineering heading at Goddard.Mr.Mignosa has worked on repairing the Hubble Space Telescope,which Goddard manages;as well as the Broad Band X-Ray Telescope,which was a Space Shuttle astronomy mission;the Tropical Rainfall Measuring Mission and the Global Precipitation Measuring Mission,gathering data for better climate modeling and carried out with JAXA,the Japanese Space Agency;and now ICE Sat-2,which will use lasers to measure the height of ice fields in an effort to understand the future of Earth's climate change.He said he's been making a number of visits to the ICE Sat-2 contractor in Arizona.*
In satellite design today,Mr.Mignosa pointed out,they always use materials so that it will demise on its own;otherwise,you will have to pay for extra fuel to control the re-entry.NASA launches a satellite every three to four months.The launches have a success rate of 95%.*
The repair of Hubble,which is in Earth orbit,involved five corrective mirrors and five corrective optics installed by Space Shuttle astronauts.The successor mission,the JamesWebb Space Telescope,has a mirror comprised of several cells.They can be electronically reconfigured for a correction,a capacity for self-repair.*
Mr.Mignosa likened NASA Goddard to a college campus.It employs about 10,000 people.Goddard has a lot of physics majors to study the physics of the planets;math majors;as well as mechanical,optical,aerospace and electrical engineers.A young student in the audience is interested in telescope design.*
NASA Goddard manages the MAVEN satellite that is probing the Martian atmosphere,some of the instruments on the Curiosity rover,as well as the Solar Dynamics Observatory.Sometimes they build their own satellites,but most often they contract them out.Goddard has extensive equipment to test the satellites for their ability to withstand the harshness of spaceflight,such as a centrifuge and vibration table.*
As for future missions,the James Webb Space Telescope,which Goddard is managing,is set for an October/November 2018 launch.It will be positioned in a solar orbit at point L2,a million miles from Earth to avoid the Earth and Moon's light.WFIRST will boast a field of view 100x greater than Hubble's,with access to a million galaxies;it will be launched in the 2020-2025 time frame.ATLAST will feature an 8-16 meter mirror and is considered  a flagship mission.Only a few people are studying the project now in its concept development phase.It is envisioned for a 2025-2035 launch.*

What NASA Astronomers Do - observational specialist graphs his career and the history of the science

Dr.Ted Gull,astronomer emeritus at the NASA Goddard Space Flight Center in Greenbelt,Maryland,described what it has been like to be an astronomer for the past 50 years-perhaps a harder job than people think-to a handful of astronomy buffs at C.Burr Artz Library in Frederick,Maryland as part of the library's Discover Space initiative this summer.Dr.Gull has been with NASA for 37 of those years,during which he has authored 597 papers.He is still continuing his research beyond his retirement two years ago.As an emeritus at GSFC,he gets a study carrel in an office he shares with 12 other people,and a computer.He has traveled so widely since retirement,he and his wife have only been home eight months over the past two years.He's been working in Sweden,Italy and Chile,among other places.*
Dr.Gull graduated from MIT in 1966,one of a group of twelve physics majors who went on to get degrees in astronomy.In the 1960s,he pointed out,photo diodes were used to measure the light of a star,one star at a time.Images were captured on 14x14 glass plates coated with a photo-sensitive emulsion-at Mt.Palomar,California,for instance,home of the then stupendous 200-inch Hale Telescope.Spectrographs were then,as they are now,one of the major tools that astronomers use.A spectrograph is a device that separates light into its wavelengths and records the data,or spectrum.University of Wisconsin astronomer Blair Savage put it this way:
A picture may be worth a thousand words;but a spectrum is worth a thousand pictures.*
Until the 1980s,Dr.Gull recalled,astronomy was very laborious,carried out in very cold conditions at night.Astronomers often worked 18 hour days preparing observations,calibrating telescopes,making the observations at night,developing and cataloging the photographic plates.It was like this until the advent of the CCD solid state devices,or charged coupled devices,which directly recorded the images,read them electronically,and provided data for processing by computer.We are developing new CCD detectors every day for future missions-and they have many military applications as well.*
The early space telescopes were OAO-1 and OAO-2 (Copernicus).Such astronomy projects took months,years-even decades-to develop.They were computer-controlled,but with primitive computers at first.The iPhone 7 is a thousand times faster than those computers were.Eventually,however,as technology progressed,observatory observations started being made in university offices hundreds or even thousands of miles from the actual telescopes.Yet even today someone still has to be on site at the observatory to operate the telescope,make sure it's working right and make weather observations.You still need clear skies for observing.*
The International Ultraviolet Explorer Telescope lasted for 18 years,from 1978-96,until its funding ran out.It was the first remotely interactive observatory.From its data,thousands of published papers and over 100 PhD theses were generated.Indeed,papers based on its data are still being written to this day.*
Dr.Gull worked directly with the astronauts for two years between the Apollo and Space Shuttle eras,preparing them for Space Shuttle astronomy projects.*
The Astro-1 space telescope was attached to the Space Shuttle.Dr.Gull was chief scientist of the mission.It was the mission from hell,Dr.Gull joked.Initially,it was to be on five different shuttle missions,and two astronomers were to fly on the shuttle as mission specialists.Dr.Gull removed himself from consideration for becoming an astronaut-a decision he doesn't regret.The Space Shuttle Challenger accident led to a hiatus of four and a half years for Astro-1,but it finally got to fly on 2-11 December 1990,and a second time five years later,which went beautifully.Astro-1 was beset by hardware problems,but they were all resolved.In the end,Astro-1 got 50% of the observations they had hoped for,and its data generated 100 papers.*
The Hubble Space Telescope was conceived by Lyman Spitzer in the 1940s as a way to circumvent the murkiness of the Earth's atmosphere,as you cannot see ultraviolet radiation through the atmosphere.Launched in 1990,it is still operational after 26 years in orbit.Its mirror is 2.4 meters in aperture.HST needed periodic upgrades and repairs.The correction of lenses and mirrors were needed;and gyros,computers and solar panels had to be changed over the course of five servicing missions.The last repair mission was in 2009,and HST is still working beautifully.
The HST mirrors were modified so as to fit in with the spy satellites the shuttle had to carry as well,Dr.Gull noted.HST is expected to be in orbit until the 2030s.It has a 96 minute orbit and is traveling at 18,000 mph.During its life,we have gone from reel-to-reel tape to all solid state memory.
Everything that goes up into space still has to be radiation-hardened,Dr.Gull added.It takes up to ten years to devise hardening for something.*
NASA's James Webb Space Telescope will be launched in 2018 from French Guiana on a European Space Agency Ariane V rocket,which demonstrates the international nature of the programme.It is named after James Webb,the first administrator of NASA.Dr.Gull actually met James Webb and feels that he was a visionary.While Dr.Gull has been photographed next to the JWST,he isn't directly involved with it.Its mission is to peer back to the first stars and galaxies in the universe,in the first 300 million years of the universe's existence.Its mirror is 6.5 meters across.*
As for his own research,there is a nebulous,or gaseous,region in the constellation Orion.Dr.Gull noticed that one of the Orion nebula's stars has an arc around it.That means the star has a wind.The star is moving through an ionised region of the nebula,creating a bow wave.Stars have massive winds,and there are over a dozen examples of this.
His favourite celestial object is the Eta Carinae binary star system.It is a Southern Hemisphere object.Eta Carinae is a massive binary that is nearing the end of its life.Eventually,two supernovae will result from it.Why is this binary so important?The first stars that formed in the universe were massive,and most likely binaries,Dr.Gull explained.This binary system is producing huge amounts of Nitrogen.Our own bodies are made of such star stuff,so we are trying to understand ourselves when we learn what the first stars were like,and how they enrich the interstellar medium.
Dr.Gull continues to do his research using the Hubble Space Telescope and Chandra X-ray Observatory,as well as the Atacama Large Millimeter Array radio telescope in Chile.Such is the life of discovery of a sharp scientific mind engaged in NASA astronomy.

Bulletin:NASA's Spitzer Telescope Discovers Accessible Red Dwarf Star With Several Earthlike Planets

For the first time,NASA has discovered a star with seven Earth-sized planets,three of which are in the habitable zone.The findings,which many scientists consider exciting,were broadcast worldwide by NASA on 22 February 2017.Agency scientists and collaborators expressed amazement at the discovery of an entire solar system of Earth cousins orbiting the ultra-cool red dwarf star called Trappist-1.Trappist-1 is 39 light years away,which is too far for crewed spacecraft to travel to in the forseeable future,yet close enough that the James Webb Space Telescope,to be launched in 2018,and even the Hubble Space Telescope currently in space,will be able to provide reams of data about the star and its solar system of possibly life-harbouring planets.
NASA said that SETI instruments had already swept the Trappist-1 solar system for signs of intelligent beings,but couldn't detect any relevant signals.Now the Spitzer Space Telescope,Kepler Space Observatory and Hubble are being trained on Trappist-1 to glean all the data they can until JWST can join the study.Planets such as the three in the habitable zone of Trappist-1 are capable of pooling liquid water on the surface.The fact that JWST,Hubble and Spitzer are able to study Trappist-1 without clouds interfering and so on,and will have three targets to study,not just one as is typically the case,makes the discovery a major step forward in the search for life on exoplanets,the scientists said.
The red dwarf star Trappist-1 is much smaller and cooler than the Sun.If the Sun is a basketball,Trappist-1 is a golf ball.One of the Trappist-1 planets,Trappist-1 F,seems likely to be water-rich.It has a nine day orbit and receives about as much starlight as Mars.On exoplanet Trappist-1 E,you could have temperatures similar to Earth;it is 5% of the distance of the Earth from the Sun to its star,Trappist-1.Trappist-1 G is the largest exoplanet in its solar system,with a radius 13% larger than Earth's.About a thousand red dwarf stars are known,and these will now be searched by all available telescopes.About a few dozen exoplanets in the habitable zone are known,yet they are not accessible to near-term study as the Trappist-1 solar system is.
We should expect final results of the study of the Trappist-1 exoplanets sometime in the early 2020's,NASA said.*
The Trappist-1 exoplanets are only a few times the distance of the Earth from the Moon to their star,Trappist-1.They are so close to each other,they look like the size of the Moon from each other's surfaces.We can get good signals-to-noise ratios while studying these Trappist-1 exoplanets.NASA JPL and contractor Lockheed Martin engineered the Spitzer telescope that made the discovery.*
Lockheed Martin (LMT)