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Jul 6, 2018 14 tweets 10 min read Twitter logo Read on Twitter
Moving on from #Asteroids #Exoplanets #SolarEclipse #StarSpectrum we now focus on #Satellites

Sputnik 1 was the first satellite to be launched (1957). Over 1200 active satellites are currently orbiting Earth.

Check out the LIVE Satellite Map…
Satellites come in different sizes: from the size of a lunch box to that of a small school bus.

And they are used for different purposes: Climate Monitoring, Agriculture, Telecommunications, Research.... How heavy is a satellite
Can #CitizenScientists access data from these satellites?

Yes! NASA makes available near LIVE data from many of its satellites in an interactive interface.

Allows browsing full-resolution, global satellite imagery!

Use it for your projects!
From Earth Observing System Data and Information System (EOSDIS) :

Get data from many satellites: #LandSAT #TerraModis #TerraAqua and in different bands depending on what you want to study - land, water, atmospheric emissions.... Earth Science Missions
Last night did visual astronomy thru 16 inch scope: saw M57 (Ring Nebula), M81, M82 (Bode & Cigar Galaxies), M17, Swan Nebula, Comets 2017 S3 Panstarrs and 21P/Giacobini–Zinner, Asteroid Vesta.... and many satellite passes. @rasc

Back to conversation on #SatelliteData projects
NASA's Earth Observing System Data and Information System (EOSDIS) allows users to get near real time data and overlay it on a range of basemaps.

For eg: putting population density and mangrove distribution over coastline data to monitor changes.
We used #EOSDIS Real Time data from #TerraAqua satellite to track Sulfur Dioxide cloud #Bogoslof Volcano 2017eruption move from Alaska, USA to Ontario, Canada
We also used satellite data from #LandSat #TerraModis to predict droughts in Kenya-Uganda Border.

With 20 years of satellite data available on normalized difference vegetation index (NDVI) for every region of World, it is possible to compare existing data with real-time data.
We took land map of the area and overlaid it with the Vegetation data from #LandSat and #TerraModis. Added 2 more layers: Human Settlements and Population Density from NASA @ciesin database.
Analysed 7 months of normalized difference vegetation index (NDVI) data (Oct 2016 - April 2017) by noting changes in vegetation index every 5 days.

Used Stop Motion Simulation package to visually display change in vegetation along the Kenya-Uganda border.
By Jan 2017 it was clear from the simulation that Kenya will face a drought. As bordering Uganda afforded better food and fodder, it was evident that people and cattle in bordering area will migrate to Uganda.

By Feb 2017, drought was declared in Kenya and migration ensued.
This project "Drop the Drought" to predict drought and migration patterns using #NASA #satellitedata won the first place in @SpaceApps Toronto and was a global nominee.

More details:…
Satellite Data can be used to create Art projects!

We downloaded data from the Canadian Satellite #RadarSat-2 and recreated the image of "Canada 150" logo by digitally rearranging the satellite imagery.

The project won the Canadian Space Apps Challenge 2017! @csa_asc
More info about our “Yes I CAN” project that uses data from the Canadian Satellite RadarSat-2 to create a digital mosaic of the Map of Canada, the Canadian Flag, and the logo of the Celebration of 150 years of Canada's Confederation is available at:

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More from @realscientists

Sep 12, 2018

Yesterday I spoke about the value of freshwater ecosystems & some threats by human alteration & a changing climate.

There’s many great voices & I’ve been saving their tweets/links just for this occasion. So thank you water tweeters for sharing your insights.
Read 20 tweets
Aug 9, 2018
Here's a thread on basic tips to help improve your next science figure! 📝 (ie common mistakes I see). It'll cover:
1) Contrast (color value) ⬛️⬜️
2) Color (it’s a tool, not decoration!) 🌈
3) Fonts 🔤
4) Image Resolution 📷
5) Spacing / margins 📐
6) By request! 💡
1a) Ahh contrast.. my favorite topic! If we lived in a world of black & white, contrast would actually be less of an issue (because we'd notice it immediately). Color variation can trick you into thinking something is legible!
1b) Left image - looks decent, but dark on dark elements getting hard to read. Right image - if converted to black and white (great trick to check contrast btw) becomes almost illegible and purple dots disappear. Bad for color blind and if figure is ultimately printed in B&W!
Read 15 tweets
Aug 7, 2018
(1/6) This was a fun piece I illustrated with @NatGeo on the neuroanatomy of the common octopus 🐙 Seems relatively simple but (as many of you can attest) a lot of good storytelling is stripping AWAY info as opposed to adding.. (here's a peak at the process work below)
(2/6) First sketch that was proposed to me for the story. I was immediately hooked since I am fascinated with octopi 😍🐙
(3/6) Most of the work in science illustration actually goes into background research, coordinating w/ world experts (sometimes means emailing across 5 different timezones - Greenland, Australia, Canada, US, Europe...). Most times we have to go with the best 'theory' out there 🤔
Read 6 tweets
Aug 6, 2018
Our team is a mix of scientists of many different skill sets and backgrounds. Some of us are great at tweeting, some of us are great at fixing cars, and some of us can cook a curry that makes you cry with happiness after a long windy day in the field.
What binds is together is our dedication to studying the workings of the Solar System by studying out of this world landmarks on Earth. #NASAFieldWork
Some of us are looking at ice and life in preparation for sending robots to Europa. That brought our Team Ice to The glacier covered volcano Kverkfjöll.
Read 8 tweets
Jul 27, 2018
So a few people have been asking about general word finding difficulties and temporary episodes of language loss. Firstly, let me just say that I am not a medical doctor. 1/2
An increase in word finding difficulties can occur with age.
Temporary episodes of language loss may be called 'aphasia' by some but the cause is temporary - diff to someone who has a brain injury that changes the brain permanently (even tho they may recover to some extent). 2/2
@rudetuesday @MoiraR @tessisrelated
I hope the information in this thread helps.
Read 4 tweets
Jul 27, 2018
So I'll start a thread that provides more information about #aphasia...
Feel free to ask any specific Qs you may have...
Aphasia is caused by an acquired brain injury, most commonly #stroke. Around 1/3 of people with left hemisphere stroke can have aphasia. Over time, the severity of the aphasia and type may change but many people live with aphasia.
Here are a couple of YouTube clips that talk more about #aphasia, posting them again here for ease of reference:

This award-winning video by @shireeheath explains aphasia from a child's perspective:
Read 14 tweets

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