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This is amazing...
5 of Your Fermi Gamma-ray Space Telescope Questions Answered
The Fermi Gamma-ray Space Telescope is a satellite in low-Earth orbit that detects gamma rays from exotic objects like black holes, neutron stars and fast-moving jets of hot gas. For 11 years Fermi has seen some of the highest-energy bursts of light in the universe and is helping scientists understand where gamma rays come from.
Confused? Don’t be! We get a ton of questions about Fermi and figured we’d take a moment to answer a few of them here.
1. Who was this Fermi guy?
The Fermi telescope was named after Enrico Fermi in recognition of his work on how the tiny particles in space become accelerated by cosmic objects, which is crucial to understanding many of the objects that his namesake satellite studies.
Enrico Fermi was an Italian physicist and Nobel Prize winner (in 1938) who immigrated to the United States to be a professor of physics at Columbia University, later moving to the University of Chicago.
Original image courtesy Argonne National Laboratory
Over the course of his career, Fermi was involved in many scientific endeavors, including the Manhattan Project, quantum theory and nuclear and particle physics. He even engineered the first-ever atomic reactor in an abandoned squash court (squash is the older, English kind of racquetball) at the University of Chicago.
There are a number of other things named after Fermi, too: Fermilab, the Enrico Fermi Nuclear Generating Station, the Enrico Fermi Institute and more. (He’s kind of a big deal in the physics world.)
Fermi even had something to say about aliens! One day at lunch with his buddies, he wondered if extraterrestrial life existed outside our solar system, and if it did, why haven’t we seen it yet? His short conversation with friends sparked decades of research into this idea and has become known as the Fermi Paradox — given the vastness of the universe, there is a high probability that alien civilizations exist out there, so they should have visited us by now.
2. So, does the Fermi telescope look for extraterrestrial life?
No. Although both are named after Enrico Fermi, the Fermi telescope and the Fermi Paradox have nothing to do with one another.
Fermi does not look for aliens, extraterrestrial life or anything of the sort! If aliens were to come our way, Fermi would be no help in identifying them, and they might just slip right under Fermi’s nose. Unless, of course, those alien spacecraft were powered by processes that left behind traces of gamma rays.
Fermi detects gamma rays, the highest-energy form of light, which are often produced by events so far away the light can take billions of years to reach Earth. The satellite sees pulsars, active galaxies powered by supermassive black holes and the remnants of exploding stars. These are not your everyday stars, but the heavyweights of the universe.
3. Does the telescope shoot gamma rays?
No. Fermi DETECTS gamma rays using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM).
The LAT sees about one-fifth of the sky at a time and records gamma rays that are millions of times more energetic than visible light. The GBM detects lower-energy emissions, which has helped it identify more than 2,000 gamma-ray bursts – energetic explosions in galaxies extremely far away.
The highest-energy gamma ray from a gamma-ray burst was detected by Fermi’s LAT, and traveled 3.8 billion light-years to reach us from the constellation Leo.
4. Will gamma rays turn me into a superhero?
Nope. In movies and comic books, the hero has a tragic backstory and a brush with death, only to rise out of some radioactive accident stronger and more powerful than before. In reality, that much radiation would be lethal.
In fact, as a form of radiation, gamma rays are dangerous for living cells. If you were hit with a huge amount of gamma radiation, it could be deadly — it certainly wouldn’t be the beginning of your superhero career.
5. That sounds bad…does that mean if a gamma-ray burst hit Earth, it would wipe out the planet and destroy us all?
Thankfully, our lovely planet has an amazing protector from gamma radiation: an atmosphere. That is why the Fermi telescope is in orbit; it’s easier to detect gamma rays in space!
Gamma-ray bursts are so far away that they pose no threat to Earth. Fermi sees gamma-ray bursts because the flash of gamma rays they release briefly outshines their entire home galaxies, and can sometimes outshine everything in the gamma-ray sky.
If a habitable planet were too close to one of these explosions, it is possible that the jet emerging from the explosion could wipe out all life on that planet. However, the probability is extremely low that a gamma-ray burst would happen close enough to Earth to cause harm. These events tend to occur in very distant galaxies, so we’re well out of reach.
We hope that this has helped to clear up a few misconceptions about the Fermi Gamma-ray Space Telescope. It’s a fantastic satellite, studying the craziest extragalactic events and looking for clues to unravel the mysteries of our universe!
Now that you know the basics, you probably want to learn more! Follow the Fermi Gamma-ray Space Telescope on Twitter (@NASAFermi) or Facebook (@nasafermi), and check out more awesome stuff on our Fermi webpage.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
“Macho Man” Randy Savage
"Macho Man" Randy Savage (1952-2011)
I believe in free education, one that’s available to everyone; no matter their race, gender, age, wealth, etc… This masterpost was created for every knowledge hungry individual out there. I hope it will serve you well. Enjoy!
FREE ONLINE COURSES (here are listed websites that provide huge variety of courses)
Alison
Coursera
FutureLearn
open2study
Khan Academy
edX
P2P U
Academic Earth
iversity
Stanford Online
MIT Open Courseware
Open Yale Courses
BBC Learning
OpenLearn
Carnegie Mellon University OLI
University of Reddit
Saylor
IDEAS, INSPIRATION & NEWS (websites which deliver educational content meant to entertain you and stimulate your brain)
TED
FORA
Big Think
99u
BBC Future
Seriously Amazing
How Stuff Works
Discovery News
National Geographic
Science News
Popular Science
IFLScience
YouTube Edu
NewScientist
DIY & HOW-TO’S (Don’t know how to do that? Want to learn how to do it yourself? Here are some great websites.)
wikiHow
Wonder How To
instructables
eHow
Howcast
MAKE
Do it yourself
FREE TEXTBOOKS & E-BOOKS
OpenStax CNX
Open Textbooks
Bookboon
Textbook Revolution
E-books Directory
FullBooks
Books Should Be Free
Classic Reader
Read Print
Project Gutenberg
AudioBooks For Free
LibriVox
Poem Hunter
Bartleby
MIT Classics
Many Books
Open Textbooks BCcampus
Open Textbook Library
WikiBooks
SCIENTIFIC ARTICLES & JOURNALS
Directory of Open Access Journals
Scitable
PLOS
Wiley Open Access
Springer Open
Oxford Open
Elsevier Open Access
ArXiv
Open Access Library
LEARN:
1. LANGUAGES
Duolingo
BBC Languages
Learn A Language
101languages
Memrise
Livemocha
Foreign Services Institute
My Languages
Surface Languages
Lingualia
OmniGlot
OpenCulture’s Language links
2. COMPUTER SCIENCE & PROGRAMMING
Codecademy
Programmr
GA Dash
CodeHS
w3schools
Code Avengers
Codelearn
The Code Player
Code School
Code.org
Programming Motherf*?$%#
Bento
Bucky’s room
WiBit
Learn Code the Hard Way
Mozilla Developer Network
Microsoft Virtual Academy
3. YOGA & MEDITATION
Learning Yoga
Learn Meditation
Yome
Free Meditation
Online Meditation
Do Yoga With Me
Yoga Learning Center
4. PHOTOGRAPHY & FILMMAKING
Exposure Guide
The Bastards Book of Photography
Cambridge in Color
Best Photo Lessons
Photography Course
Production Now
nyvs
Learn About Film
Film School Online
5. DRAWING & PAINTING
Enliighten
Ctrl+Paint
ArtGraphica
Google Cultural Institute
Drawspace
DragoArt
WetCanvas
6. INSTRUMENTS & MUSIC THEORY
Music Theory
Teoria
Music Theory Videos
Furmanczyk Academy of Music
Dave Conservatoire
Petrucci Music Library
Justin Guitar
Guitar Lessons
Piano Lessons
Zebra Keys
Play Bass Now
7. OTHER UNCATEGORIZED SKILLS
Investopedia
The Chess Website
Chesscademy
Chess.com
Spreeder
ReadSpeeder
First Aid for Free
First Aid Web
NHS Choices
Wolfram Demonstrations Project
Please feel free to add more learning focused websites.
*There are a lot more learning websites out there, but I picked the ones that are, as far as I’m aware, completely free and in my opinion the best/ most useful.
Learn for free
Cape Canaveral Launch Complex
on the moon
Aus dem Blog Wanderungen im Harz: die deutsche Version von Joshua Tree.
Russia’s present known military bases in the Arctic and North Pacific, including Wrangel Island and on Cape Schmidt, the eastern coast of the Chukchi autonomous region.
No-Go areas for travellers
Köln oder Hamburg, Regensburg oder Lübeck - auf den ersten Blick ist Stadt gleich Stadt. Doch die Unterschiede sind mitunter gewaltig. Eine Geschichte des Städtebaus in Schwarzplänen. Mit interaktiver Karte für ganz Deutschland.
SDCC 2019: It looks like we’re going to find out a lot more about Natasha Romanoff in Marvel Studios’ Black Widow starring Scarlett Johansson reprising her MCU role. She will be joined by David Harbour as Alexei AKA The Red Guardian, Florence Pugh as Yelena, O-T Fagbenle as Mason, and Rachel Weisz as Melina. Cate Shortland is directing. Marvel Studios’ Black Widow will come to theaters May 1, 2020. (x)
Bildforensik - Die Analyse von JPG-Bildern
Amazing
The first graphic animation I‘ve seen on my own Personal Computer in 1993
Muss man ein schlechtes Gewissen haben, wenn man eine Flugreise antritt? Nein, sagt unser Autor. Er schreibt seit der Kyoto-Konferenz 1997 über Klimaschutz.
Mal eine gute und differenzierte Betrachtung. Gute Ansätze drin.