science newsletter

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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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'

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