science newsletter
TRANSCRIPT
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7/24/2019 Science Newsletter
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ON AURORAS: WHAT MAKES THEM HAPPE
IN THE SPOTLIGHT: ELECTROMAGNETIS
NCBALook around you. Wha
do you !""?
#"$% a&& you !"" '!SCIENCE.
In our n"(!&""r% ("!ho(% ")$&a'n% andan!("r your *a+"dund"r!and'n, o- h"d'"r"n $h"no/"na%/y!0"r'"! and "1"n!'n our !urround'n !.
NATIONAL COLLEGE O2 BUSINESS ANARTS3E3ICATE3 TO ACA3EMIC E4CELLENCEO22ICIAL NEWSLETTER5 ACA3EMIC #EAR 67890678
SCIENCE AN3TECHNOLOG#3EPARTMENT
H"r";! a !ory: I/a,'n" h"r";! an 'n1'!'*&" -or
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!A# 1 S%& '& !(A), B*+. SAN (AN %A+%A+, *A' .N/BA.#)(.!0
Con'nua'on.@Bu ' (a!n; un'& h" 877;! ha (" =,ur"d ou (o k"y h'n,! h
h"&$"d u! ")$&a'n h" aurora. On"% ' urn! ou h" Earh '! r"a&&y u! a *
/a,n"% and !"
ON AURORAS: WHAT MAKES THEM
STEPHEN
Umbra darker and cooler part; penumbra lighter and hotter part
Our Sun have his own version of pimple: sunspot. And just like astubborn pimple it is only temporary.
Sun!$o! ar" dark"r%
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7/24/2019 Science Newsletter
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IN THE SPOTLIGHT:A! you $ro*a*&y kno(% "&"
R"/"/*"r ha "&"
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SOLARSTORM:
3"ad&y !una/'o-rad'oa4, the largest recordedgeomagnetic storm occu-rred. 8rom August 13 untilSeptember 1, $3>4,
numerous sunspots andsolar flares were observedon the Sun, with the largestflare on September $. %hisis referred to as the Solarstorm of $3>4 or the/arrington #vent.
ELECTROMAGNETIC
!A# 5 S%& '& !(A), B*+. SAN (AN %A+%A+, *A' .N/BA.#)(.!0
/ommunication blac2outs ? yep you guessed it ? communication systems 2noc2edout.
t is a total lac2 of radio communications capability, caused by ionosphericanomalies, for e6ample, during strong auroral activity or during re-entry of aspacecraft into the #arth@s atmosphere.
/ommunication blac2outs are common in space e6ploration. 0owever, in mannedspace e6plorations, blac2outs means no communication between the spacecraft andthe control center in the #arth. t usually lasts only for a few minutes.
*eentry blac2outs are caused by an envelope of ionied air around the craft,created by the heat from the compression of the atmosphere by the craft. %he ioniedair interferes with radio signals.
HELLO?AN#ONE
THERE?Co//un'