Public Circle Members

Michael Snyder

Amy Shira Teitel

Ray Sanders

Bringing space back down to Earth!

Philip Plait (The Bad Astronomer)

I write about the Universe.

Fraser Cain

Publisher of Universe Today, a site about space ...

SPACE.com

#1 Source For Space And Astronomy News.

Camilla Corona SDO

I am Camilla Corona SDO with NASA's Solar ...

NASA

Explore the universe and discover our home planet ...

Jason Major

Space Blogger

SpaceX

SpaceX designs, manufactures and launches the ...

Brian Koberlein

Astrophysicist, Professor, Science Communicator

Alan Boyle

Stuart Forman

Astronomers Without Borders

One People, One Sky

Ian O'Neill

Star stuff, eventual star chum.

Ron Garan

I think we live on a pretty cool planet (and by ...

Kevin Baird

Fringineer

The Sun Today

Solar Facts and Space Weather

StarTalk

Science meets pop culture on StarTalk! ...

Fragile Oasis

Connecting Space and Earth. Learn. Act. Make A ...

Edward Lu

Jens Riggelsen

César Cantú

I come to learn and to have fun / Vengo a ...

Lars Occhionero

Astrophysicsist in training and geek

Nancy Atkinson

Just tryin' to keep track of the Universe...

Bob Jacobs

"Got me a boat load of terribly strange folk ...

European Space Agency, ESA

The European Space Agency (ESA) is Europe’s ...

Emily Lakdawalla

Senior Editor and Planetary Evangelist for The ...

Scott Lewis (Bald Astronomer)

Astronomer, Researcher, Education & Public ...

Chris Radcliff

Programmer, Writer, Space Advocate, Citizen ...

NASA's Earth Observatory

NASA images and stories about climate and the ...

John Chumack

Astrophotographer /Astronomer - The Chumack ...

Virgin Galactic

The world's first commercial spaceline

Virtual Star Party

Look through multiple telescopes, live!

Sunita Williams

Launching to the International Space Station July ...

Michael Rector

Amateur astronomer by night, self check-out ...

Astronomy Cameras

Manufactured to industrial standards by The ...

Samantha Cristoforetti

Astronomy Picture of the Day (APoD)

Discover the cosmos!

Nathan Bergey

Open Source Rocket Scientist

Peter Edmonds

Astronomer, husband, Dad

Dear Astronomer

Bringing Space Back Down to Earth!

Cory Schmitz

Consume what you need, produce what you can.

Jukka Laakso

Rumpuja soittava amatööritähtitieteilijä

Sean Walker

Artist, Astrophotographer, Editor, Author, dabbler

Kristian Jerslev

MSc student in astrophysics (cosmology), Science ...

Isaac Kuo

Dreaming of kinetic impact powered rockets and ...

B612 Foundation .

Protecting Humanity

Don Pettit

NASA Astronaut, currently onboard the ...

ali llewellyn

thankful.

NASA Goddard Space Weather Center .

Protecting NASA missions through research and ...

Paul Cox (Coxy)

An Architect by profession; an engineer through ...

Amiko Kauderer

Storyteller. Modern hippie. Competitive creep. ...

James Morgan

SETI Institute

Our mission is to explore, understand and explain ...

Thilina Heenatigala

Astronomy Communicator (with a focus on ...

NASA Goddard

NASA Goddard Space Flight Center