Me

No User

You must log in to access your account.

Gamma Ray

Gamma Ray

Seminar: Observational Techniques in X- and Gamma-Ray ...

"Seminar: Observational Techniques in X- and Gamma-Ray Astronomy. Dr. Niels Lund. Emeritus scientist. DTU Space Technical University of Denmark".High-energy astronomy, specifically X- and gamma-ray astronomy are young sciences, they are children of the space age - born only 50 years ago. We need to go to space to get a good view of the high-energy sky. Contrary to optical astronomy which cover only a narrow span of wavelengths the high energy astronomy spans many decades of energy. It is therefore no surprise that the observational challenges vary strongly between observations of low energy X-rays and of high energy gamma-rays. The differences are clearly illustrated when we compare the million known sources of keV X-rays, with the scant thirty sources known to emit at 1 MeV. At still higher energies life gets a bit easier, and the number of known sources raises again. The reasons for this huge discrepancy will be discussed as well as the efforts to penetrate into the difficult energy band around 1 MeV.

Videos

Gamma Ray 'Hellbent' Official Lyric Video from the new album 'Empire Of The Undead'

Pre-order the album now: CD+DVD: http://smarturl.it/GR_EOTU_SPEC | CD: http://smarturl.it/GR_EUTU_CD | 2Vinyl: http://smarturl.it/GR_EUTU_LP 'Empire Of The U...

Gamma Ray 'Empire Of The Undead' Song 1 'Avalon'

Order the album now: CD+DVD: http://smarturl.it/GR_EOTU_SPEC | CD: http://smarturl.it/GR_EUTU_CD | 2Vinyl: http://smarturl.it/GR_EUTU_LP | iTunes: http://sma...

Gamma Ray "Master Of Confusion" Official Rehearsal Lyric Video (HD)

Order here (Germany): Amazon: http://amzn.to/TJLCLl UK: iTunes https://itunes.apple.com/gb/album/master-of-confusion/id606860170 Amazon MP3 http://www.amazon...

Gamma Ray 'Empire Of The Undead' Song 10 'I Will Return'

Order the album now: CD+DVD: http://smarturl.it/GR_EOTU_SPEC | CD: http://smarturl.it/GR_EUTU_CD | 2Vinyl: http://smarturl.it/GR_EUTU_LP | iTunes: http://sma...

Gamma Ray Heading for the East Full Concert

Full Concert.

Gamma ray the best songs (1990 - 2014 ) \m/

Gamma Ray (feat Tobias Sammet) - I want out - Live in Aschaffenburg 2014

GAMMA RAY "To The Metal!" (Official Video HD)

The first single from Gamma Ray's studio album of the same title. This video, together with videos for "Rise" and "Empathy" can be found on the CD+DVD limite...

Gamma Ray - Follow Me (Subtítulos en Español)