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| THEMIS |
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NASA's THEMIS mission with five identical probes
will track the aurora-dynamic, colorful eruptions
near the Northern and Southern poles. These
eruptions are linked to energy releases in Earth's
magnetosphere, called substorms, and their trigger
mechanism has remained a scientific mystery. When
the five identical probes align over the North
American continent - every four days for about 15
hours - scientists will collect coordinated
measurements along the Sun-Earth line. This will
provide the first comprehensive look at the onset
of substorms and how they trigger auroral
eruptions. Twenty ground stations in Northern
Canada and Alaska with automated, all-sky cameras
and magnetometers will document the auroras from
Earth. This will give scientists the first
comprehensive look at the phenomena from Earth's
upper atmosphere to far into space.
The planned launch date is 15th February 2007.
Tags : THEMIS aurora borealis substorm northern lights |
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Affichage : 1372
Durée : 307 s |
| THEMIS - UCB/NASA Space Mission, 1/17/07 |
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UC Berkeley leads NASA's mission to launch five
identical space probes — the largest number of
spacecraft ever attempted by the agency on a
single rocket — to solve a decades-long mystery
about the origin of magnetic storms that turn the
green, shimmering curtains of the Earth's Northern
and Southern Lights into colorful, dancing light
shows.
(6:00 min.) Contact: Roxanne Makasdjian, UCB Media
Relations
http://www.berkeley.edu/news/media/releases/2007/0
1/17_themis.shtml
Tags : uc berkeley cal THEMIS auroras |
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Affichage : 151
Durée : 360 s |
| THEMIS Launch |
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NASA's THEMIS mission successfully launched, on
board a Delta II rocket, Saturday, Feb. 17, at
6:01 p.m. EST from Pad 17-B at Cape Canaveral Air
Force Station.
THEMIS stands for the Time History of Events and
Macroscale Interactions during Substorms. It is
NASA's first five-satellite mission launched
aboard a single rocket. The spacecraft separated
from the launch vehicle approximately 73 minutes
after liftoff. By 8:07 p.m. EST, mission operators
at the University of California, Berkeley,
commanded and received signals from all five
spacecraft, confirming nominal separation status.
Tags : THEMIS Launch Liftoff |
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Affichage : 1074
Durée : 599 s |
| NASA - THEMIS Spacecraft Animation |
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Taking multitasking to new heights, NASA launched
the five THEMIS satellites aboard a single Delta
II rocket from Cape Canaveral Air Force Station in
Florida at 6:01 p.m. EST. Racing into space on the
flaming power of three rocket stages and nine
solid rocket motors, the THEMIS satellites will
soon disperse around Earth to monitor auroras like
the Northern Lights.
NASA is undertaking the mission to investigate
what causes auroras in the Earth's atmosphere to
change in appearance and dissipate. Discovering
why the light of auroras can fluctuate and fade
will provide scientists with important details on
how the planet's protective magnetosphere works
and on the sun-Earth connection.
The Mission
THEMIS is a mission to investigate what causes
auroras in the Earth's atmosphere to dramatically
change from slowly shimmering waves of light to
wildly shifting streaks of color. Discovering what
causes auroras to change will provide scientists
with important details on how the planet's
magnetosphere works and the important Sun-Earth
connection.
Tags : NASA Science space rocket aurora satellite THEMIS Spacecraft Animation |
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Affichage : 1145
Durée : 122 s |
| Rebetika: Themis Adamandidis-Helidoni+Prin To Harama Monahos |
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[ Lyrics / Stixoi ]
1) Helidoni
-----------------
Aprili pira ti zoi sou
ke esire o haros to horo
pos na diavaso ti psihi sou
enas akoma sto soro
ah ilie mou den to boro
Nihtoni giro mas, nihtoni
ki ine skiftos o ouranos
ehis petaksi helidoni
ki akri den ehi o kaimos
Svisti fotia ine i kardia sou
kato ap to hioni mes 'ti gi
sti petra anthizi to onoma sou
agia moy Kesariani
ah mana mou ke si mazi
2x [ Nihtoni giro mas, nihtoni
ki ine skiftos o ouranos
ehis petaksi helidoni
ke akri den ehi o kaimos ]
Ehis petaksi helidoni
ke akri den ehi o kaimos
2) Prin To Harama Monahos
-----------------
Prin to harama monahos eksekinisa
ke sto proto mas to steki
tin avgoula girisa,
ke sto proto mas to steki,
tin avgoula girisa
Kapia alli m'ihe bleksi me kamomata
s'agapo ki irtha konda sou
prin ta ksimeromata,
s'agapo ki irtha konda sou
prin ta ksimeromata
Prin akoma svisoun t'astra ekseportisa
ah na ksanavro ta dio sou hili
pou pote den hortasa,
na ksanavro ta dio sou hili
pou pote den hortasa
=========================
1) Χελιδόνι
--------------------
Απρίλη πείρα τη ζωή σου
και έσυρε ο χάρος το χορό
πως να διαβάσω τη ψυχή σου
ένας ακόμα στο σορό
αχ ήλιε μου δεν το μπορώ
Νυχτώνει γύρο μας, νυχτώνει
κι είναι σκυφτός ο ουρανός
έχεις πετάξει χελιδόνι
και άκρη δεν έχει ο καημός
Σβηστή φωτιά είναι η καρδιά
σου
κάτω απ το χιόνι μέσ 'τι γη
στη πέτρα ανθίζει το όνομα
σου
άγια μου Καισαριανή
αχ μάνα μου και συ μαζί
2x [ Νυχτώνει γύρο μας,
νυχτώνει
κι είναι σκυφτός ο ουρανός
έχεις πετάξει χελιδόνι
και άκρη δεν εχει ο καημός ]
Έχεις πετάξει χελιδόνι
και ακρι δεν εχει ο καημός
2) Πριν Το Χάραμα Μονάχος
--------------------
Πριν το χάραμα μονάχος
εξεκίνησα
και στο πρώτο μας το στέκι
την αυγούλα γύρισα,
και στο πρώτο μας το στεκι,
την αυγούλα γύρισα
Κάποια άλλη μ' είχε μπλέξει
με καμώματα
σ' αγαπώ κι ήρθα κοντά σου
πριν τα ξημερώματα,
σ' αγαπώ κι ήρθα κοντά σου
πριν τα ξημερώματα
Πριν ακόμα σβήσουν τ' άστρα
εξεπόρτισα
αχ να ξανάβρω τα δυο σου
χείλι
που ποτέ δεν χόρτασα,
να ξανάβρω τα δυο σου χείλι
που ποτε δεν χόρτασα
Tags : themhs adamandidis adamantidis adamantidhs helidoni xelidoni prin to harama xarama monahos monaxos rempetika rembetiko |
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Affichage : 28746
Durée : 465 s |
| THEMIS: Understanding Space Weather - Northern Lights. |
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Introduction
Blooming flowers, chirping birds and warmer
weather are all signs that spring has arrived. But
a lesser-known sign of spring are auroras, or the
Northern Lights. For reasons not yet fully
understood by scientists, the weeks around the
vernal equinox are prone to auroras. But NASA is
aiming to solve this mystery and others with a new
mission to study the Northern Lights, called
THEMIS.
Nicky Fox, NASA scientist: These are just caused
by energy coming into our Earth's magnetic
atmosphere causing the whole magnetic field to
reconfigure and end up with an explosive release
of high-energy electrons and protons into our
earth's atmosphere, where they strike the
molecules, both oxygen and nitrogen and cause them
to glow.
Narrator: Besides igniting the northern lights,
these substorms can create big problems here on
Earth by disrupting power grids, satellites, air
travel and even GPS signals.
Spring is one of the best times to view the
auroras because the substorms that spark them are
more frequent in the months around the equinoxes.
Plus the longer nights provide a great backdrop
for these stunning displays.
While auroras have fascinated observers for
centuries, little had been known about their
origin. But NASA's aiming to resolve this mystery
with a new mission to study the northern lights,
called THEMIS.
The THEMIS mission uses 5 identical satellites,
and a network of ground observatories to track and
determine what triggers the auroras that occur
during substorms.
And since its launch just last year, THEMIS has
made some important discoveries.
David Sibeck, NASA scientist: Even in the first
days of our mission we've used these five
spacecraft and the dedicated array of ground
observatories to track aurora racing westward
across canada and alaska and time their motion and
understand where they occur.
As our knowledge about the northern lights
continues to expand, pretty soon auroras may not
seem so mysterious after all.
Tags : THEMIS Auroras space weather carl sagan nasa hawkins Northern Lights South Polar |
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Affichage : 881
Durée : 261 s |
| THEMIS/Delta II Assembly |
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THEMIS assembly and integration with the Delta II
rocket.
THEMIS is a mission to investigate what causes
auroras in the Earth's atmosphere to dramatically
change from slowly shimmering waves of light to
wildly shifting streaks of color. Auroras start
when particles from the Sun bombard an electrical
field surrounding the planet called the
"magnetosphere." The influx of solar particles
forces glowing electrons to rain down through the
atmosphere and light up the sky. Discovering what
causes auroras to change will provide scientists
with important details on how the magnetosphere
works and the important Sun-Earth connection.
The Delta II is designed to boost medium-sized
satellites and robotic explorers into space. NASA
selected a model 7925-10 for this mission, which
is a three-stage rocket equipped with nine
strap-on motors and a protective 10-foot payload
fairing.
Launch is scheduled for 17th February 2007.
Tags : THEMIS Delta II Assembly |
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Affichage : 3265
Durée : 599 s |
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