Space Knowledge Explorer
Cosmos
A growing encyclopedia of the things I find most interesting about the cosmos, space exploration, and humanity's journey to the stars.
Featured Entries
Jupiter
The largest planet, a stripey hydrogen giant whose Great Red Spot has been swirling for at least 300 years.
Europa
Jupiter's icy moon hiding a deep saltwater ocean. Twice as much water as Earth, and one of the best places to look for life.
Milky Way
Our galaxy, a barred spiral containing 200 to 400 billion stars and at least 100 billion planets.
James Webb Space Telescope
An infrared observatory parked at L2, peering deeper into space and time than anything before, back toward the first galaxies.
Voyager 1 & 2
Twin probes launched in 1977 that toured the outer planets, then kept going. Now beaming data back from interstellar space.
Orion Nebula
The closest large star-forming region to Earth, glowing in the sword of Orion 1,500 light-years away.
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“Somewhere, something incredible is waiting to be known.”
— Carl Sagan
