You Never See the Sun Where It Actually Is — Only Where It Was 8 Minutes Ago
Light takes time to travel, so every glance into space is a glance into the past. The night sky shows stars as they were years, even millennia, ago.
Today’s hidden fact · Sunday, August 9, 2026
Voyager 1 is over 24 billion km away, so far its radio signal takes 22+ hours to arrive, sent by a transmitter weaker than a refrigerator bulb.
A football-field-sized lab, falling around Earth at 8 km every second.
ISS Oleg Kononenko · Nikolai Chub · Tracy Caldwell Dyson · Matthew Dominick · Michael Barratt · Jeanette Epps · Alexander Grebenkin · Butch Wilmore · Sunita Williams
Tiangong Li Guangsu · Li Cong · Ye Guangfu
2018 GS1

NASA Science
"Happy New Year!" No, wait, this is not a fireworks display. This image shows Nebula Pa 30, observed with the Gemini North Telescope in Hawai'i. It is likely the remnant of an old supernova explosion: separate historical records by Chinese, Japanese and Arabic…

Falcon 9 Block 5 | Starlink Group 15-15

Electron | We're Not Hawking Around (3x HawkEye 360)

Long March 6A | Unknown Payload

Long March 4B | Unknown Payload

Long March 8A | Unknown Payload

Falcon 9 Block 5 | Starlink Group 15-16

Vulcan VC6L | Amazon Leo (LV-01)

Falcon 9 Block 5 | Starlink Group 15-18

GSLV Mk II | IRNSS-1L (NVS-03)

Long March 12A | Flight 2

SSLV | AayulSAT-1A & others

Electron | The Sea God Surveys (iQPS Launch 9)

Falcon 9 Block 5 | NROL-195

Electron | The Mountain God Rises (iQPS Launch 10)

Falcon 9 Block 5 | Starlink Group 15-21
2018 GS1
2017 UX7
2017 UQ7
516803 2010 JG88
2002 TA69
2004 HX53

ESA · today
Stars brewing in a nebulous cauldron
From the ESA Blogs.…

ESA · today
Moon crane to take a load off lunar landers

NASA · today
APOD: 2026 October 22 – The First Green Star, WD J1330+6435

NASA · today
Fires Char New Guinea

NASA · today
Faster to Science: A Letter to the Science Community

NASA · today
NASA Conducts RS-25 Engine Test in Support of Future Artemis Missions

NASASpaceflight · today
China readies first commercial resupply craft, first booster reflight, and next landing attempt
Scroll from your rooftop to the edge of the observable universe. Every stop is real.
Begin the voyage →The real solar system, computed from orbital mechanics. Scrub time and watch the maths.
Run the simulation →Five questions, one round a day, same for the whole planet. Build your streak.
Play today's round →Put Earth next to the Sun. Then next to a black hole. Watch your brain give up.
Compare anything →Black hole, light-year, quasar — every space term, explained like a human.
Learn the language →Light takes time to travel, so every glance into space is a glance into the past. The night sky shows stars as they were years, even millennia, ago.
In 2015 we caught two black holes colliding a billion light-years away, wobbling spacetime by less than the width of a proton. Einstein predicted it a century earlier.
The Carrington Event made auroras glow over the tropics and shocked telegraph operators. A repeat today could cripple power grids and satellites worldwide.