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.
Shenzhou 23 Zhu Yangzhu · Zhang Zhiyuan · Lai Ka-ying
Soyuz MS-29 Pyotr Dubrov · Anna Kikina · Anil Menon
Crew-13 Dragon Jessica Watkins · Luke Delaney · Joshua Kutryk · Sergey Teteryatnikov
2015 TS238

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…

Long March 12 | Unknown Payload

Falcon 9 Block 5 | SDA Tranche 1 Transport Layer A

Falcon 9 Block 5 | Starlink Group 15-25

Falcon 9 Block 5 | Dragon CRS-2 SpX-35

Falcon 9 Block 5 | USSF-xxx ("TH-2")

H3-24 | Martian Moon eXplorer (MMX)

Ariane 64 Block 2 | Amazon Leo (LE-04)

Falcon 9 Block 5 | Bandwagon 5 (Dedicated Mid-Inclination Rideshare)

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

Long March 12A | Flight 2

SSLV | AayulSAT-1A & others

Vulcan VC6L | Amazon Leo (LV-01)

Soyuz 2.1b | Progress MS-36 (97P)

Ariane 62 | Metop-SG B1

Falcon 9 Block 5 | Cygnus CRS-2 NG-25
2015 TS238
2019 SD8
2018 EH4watched by NASA
678976 2018 EH4watched by NASA
2009 TK8
2012 WH1

ESA · today
Solar Orbiter tracks origin of mysterious magnetic switchbacks
The European Space Agency-led Solar Orbiter spacecraft has flown through an S-shaped kink known as a ‘switchback’ in the solar wind’s magnetic field. By fingerprinting the elusive …

ESA · today
Keeping the sky dark and quiet

NASA · today
APOD: 2026 October 8 – The Saturn System Smörgåsbord

NASA · today
Fighting Drought in Texas Cotton Country

NASA · today
NASA Sets Coverage for SpaceX 35th Station Resupply Launch, Arrival

NASA · today
NASA’s SpaceX 35th Commercial Resupply Mission Overview

NASA · today
NASA’s PRIMA Spacecraft (Artist’s Concept)
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.