Profile

Cover photo
Dean Calahan
Attended Johns Hopkins: Ph.D. Biology
Lives in Chesapeake Bay
7,419 followers|865,298 views
AboutPostsCollectionsPhotos+1's

Stream

Dean Calahan

Shared publicly  - 
 
Crowdsourcing space development.
 
+Kevin Eichelberger   ‏@kpe
.@elonmusk we found part of your  @SpaceX washed ashore in the Bahamas w/@grierallen +Grier Allen @natedapore 
https://twitter.com/kpe/status/604418558181785600

+Grier Allen ‏@grierallen 
@elonmusk we will be sending @GoPro cam and sim cards back to @SpaceX today.  hope it helps with reusability research.    
+Nate DaPore   @natedapore @kpe
https://twitter.com/grierallen/status/605466111757430784

+Elon Musk ‏@elonmusk 
@kpe @SpaceX @grierallen @natedapore Cool, thanks for letting us know. This is helpful for figuring out fairing reusability.
https://twitter.com/elonmusk/status/605460768516014080
8 comments on original post
4
Add a comment...

Dean Calahan

Shared publicly  - 
 
If this goes well, then yippie!
 
Get ready, folks. We're about to go sailing! #LightSail
LightSail is almost ready for its moment in the sun. Mission managers gave the go-ahead for a manual solar sail deployment as early as Tuesday.
3 comments on original post
10
Tom Nathe's profile photoDean Calahan's profile photoYu ZHI Cheng's profile photo
3 comments
 
你好,什麼準備好,就要去航海呢?
 ·  Translate
Add a comment...

Dean Calahan

Shared publicly  - 
 
We go from black to blood in the fungal world.
 
The bleeding tooth fungus(Hydnellum peckii)!
===============================
This odd mushroom found in North America and Europe goes by many names, including strawberries and cream, the bleeding tooth fungus, the red-juice tooth, and the Devil's tooth. Younger specimens bleed a bright red juice that has anticoagulant properties. Though they aren't toxic, their extremely bitter taste makes them inedible. The species grows under pine trees in forests.
Photo by Bernypisa/Wikipedia
Read more: http://www.mnn.com/earth-matters/wilderness-resources/photos/14-bizarre-and-beautiful-mushrooms/hydnellum-peckii#ixzz3becd4Ump
1 comment on original post
8
Add a comment...

Dean Calahan

Shared publicly  - 
 
Watch this video to get sense of space.
 
Take a ride to the International Space Station! Watch this time-lapse video from March 27 showing the Soyuz spacecraft, carrying the #YearInSpace crew, catching up and docking with the orbiting laboratory.

http://www.nasa.gov/oneyear
53 comments on original post
16
2
Daniel Sprouse's profile photomangal hansdah's profile photo
Add a comment...

Dean Calahan

Shared publicly  - 
 
Cassini mission beginning to wind down with a last glimpse of the moon Hyperion
 
Cassini Prepares for Last Up-close Look at Hyperion Sunday, May 31
From NASA: NASA's Cassini spacecraft will make its final close approach to Saturn's large, irregularly shaped moon Hyperion on Sunday, May 31. The Saturn-orbiting spacecraft will pass Hyperion at a distance of about 21,000 miles (34,000 kilometers) at approximately 6:36 a.m. PDT (9:36 a.m. EDT). Mission controllers expect images from the encounter to arrive on Earth within 24 to 48 hours. Read more: http://www.nasa.gov/jpl/cassini-prepares-for-last-up-close-look-at-hyperion
Credit: NASA/JPL/Space Science Institute
11 comments on original post
7
3
Michael Ehline's profile photoGiovanni Ranzo's profile photo
Add a comment...

Dean Calahan

Shared publicly  - 
 
I've been sorting through old posts, organizing a few collections. I keep noticing favorite posts and now gratuitously re-share them (indeed, some will be re^n-shares).
Dean Calahan originally shared to Biopix:
 
You are looking at a picture of algae, although you may not know it. Periphyton. A shot down through a hole in a railing on the fishing pier where the Seattle Water Taxi boards in West Seattle.

Either that or a distorted gas giant planet.
View original post
1
Add a comment...
Have them in circles
7,419 people
Natalia Manrique's profile photo
Pam Hoelzle's profile photo
brainpets maas's profile photo
Eric Tufts's profile photo
Jonathan Taylor's profile photo
Aniketh Dsouza's profile photo
Adrian Alexandru's profile photo
Badur deen faees's profile photo
Ryan Peterson's profile photo

Dean Calahan

Shared publicly  - 
 
I'm going to end up reading this. I've been putting off becoming all edumacated up on blockchain, but if a reliable, comprehensive book comes out from a publisher I trust, I'm going to have to stop procrastinating.
 
.@LaBlogga @OReillyMedia book is the definitive primer on the blockchain & its applications http://goo.gl/e5Nm6O
View original post
2
Add a comment...

Dean Calahan

Shared publicly  - 
 
I hate when this happens (loss of contact, especially in such a low-budget citizen project). But of course I love when this happens (contact restored!): already they will be improving the next design!

This test project won't actually sail anywhere. It will simply deploy the sail and demonstrate thrust. It is partnered with another tiny craft that will fly in proximity to observe the deployment.

My fantasy is a solar sail for long-term thrust and an ion drive for navigational authority, or at least trim. Aim fleets of "solar sail/ion drive/corner reflectors" (SSIDCRs?) to drive through the various Lagrangian nodes of the so-called Solar System Superhighway (SCSSS?) as a sensitive probe of Solar System dynamics.
 
Contact! LightSail Phones Home after 8-Day Silence

The Planetary Society’s LightSail test spacecraft reported for duty this afternoon, heralding the end of an uneasy silence caused by a suspected software glitch. At 5:21 p.m. EDT (21:21 UTC), an automated radio chirp was received and decoded at the spacecraft's Cal Poly San Luis Obispo ground station. Another came in eight minutes later at 5:29 p.m.

Full story here:
http://www.planetary.org/blogs/jason-davis/2015/20150530-lightsail-phones-home.html

Why was the LightSail test spacecraft silent?
http://www.planetary.org/blogs/jason-davis/2015/20150526-software-glitch-pauses-ls-test.html

More information on LightSail:
http://sail.planetary.org/

Image credit: LightSail and the Milky Way (artist's rendition) The Planetary Society http://bit.ly/1LQTzpE CC BY-NC 3.0 http://bit.ly/1LQTAKf

#science   #space   #lightsail   #planetarysociety   #spaceexploration  
View original post
18
1
John Waters's profile photo
Add a comment...

Dean Calahan

Shared publicly  - 
 
There are some great black fungi. I would love to see them. I'm fond of Hoxlium duclium myself.
 
Black earth tongues (Trichoglossum hirsutum) are fungi commonly found in soil that's poor in nutrients. Photo: Pinterest user mikepots, via AsapSCIENCE
View original post
5
1
Marga S's profile photo
Add a comment...

Dean Calahan

Shared publicly  - 
 
A closeup from Curiosity.
 
A lot of very small, rounded nodules among the layers in these new Curiosity images. Martian spider eggs! Or maybe just more evidence for past water...
1 comment on original post
4
Add a comment...

Dean Calahan

Shared publicly  - 
 
A nice simulation, suggestive of comets like Rosetta's. And perhaps helpful in visualizing certain novels by +Neal Stephenson that just came out.
 
67P Churymov-Gerasimenko
This computer-generated collision scenario shows how two icy spheres, each with a diameter of about one kilometer, probably collided to form a bi-lobed comet nucleus. 
After an initial impact the bodies separate and re-impact around a day later in a gentle merger. 
The comet Churymov-Gerasimenko is currently being studied by scientists using the European Space Agency's Rosetta spacecraft.
Credit : Jutzi/Asphaug.
View original post
5
Add a comment...
Dean's Collections
People
Have them in circles
7,419 people
Natalia Manrique's profile photo
Pam Hoelzle's profile photo
brainpets maas's profile photo
Eric Tufts's profile photo
Jonathan Taylor's profile photo
Aniketh Dsouza's profile photo
Adrian Alexandru's profile photo
Badur deen faees's profile photo
Ryan Peterson's profile photo
Work
Occupation
Algae farmer
Skills
Cell & molecular biology, genetics, bioinformatics, software engineering, making things happen
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Chesapeake Bay
Previously
Puget Sound - Willamette Valley
Story
Tagline
Genes, Cells, Informatics, …Algae!
Introduction
Willamette brewed, Puget aged, Chesapeake decanted.

I love reading what you post directly. However, I don't want to see what you've +1'd. You can control "Shared Endorsements" through "Settings".
Bragging rights
Walked around Mount Rainier in nine days. Hiked the entire Olympic National Park coast. Rain camped, snow camped, intentionally.
Education
  • Johns Hopkins: Ph.D. Biology
  • Towson University: B.S. Molecular Biology, Biochemistry, & Bioinformatics
Links
Dean Calahan's +1's are the things they like, agree with, or want to recommend.