ESA / EUCLID
Euclid opens the next map of the dark universe
The DR1-Foundation release brings survey material into public view. The interesting part is what independent researchers can test with it.
Enter the event fileFIELD CALENDAR / UPDATED OCTOBER 21, 2026
The next signal is already on its way.
12 coming thresholds in space science and the sky. Keep the clock close, follow the experiment, and return when the evidence changes.
Bookmark this field calendar. We will keep the source records and mission dates under review.
Follow the next milestone →NEXT / ESA / HERA
Hera returns to the DART impact site
A spacecraft changed a moonlet's orbit. Hera goes back to discover what the collision actually did to the asteroid.
November 2026, expected arrival window
What to watch for—MONTHS
—WEEKS
—DAYS
—HOURS
—MINUTES
Until the expected November arrival window begins
BEYOND THE NEXT SIGNAL
On the horizon.
ESA & JAXA / BEPICOLOMBO
BepiColombo enters Mercury's orbit
After years of flybys and braking, two science orbiters prepare to investigate a small planet with an outsized interior.
Enter the event fileNASA / ROMAN SPACE TELESCOPE
Roman approaches the dark side of Earth
The telescope has already seen starlight. Its next threshold is the orbit where its wide-field search can begin.
Enter the event fileESA / GAIA DATA RELEASE 4
The Milky Way gives up another map
A new Gaia catalog is expected to deepen the record of stellar motion and chemistry behind the Sun’s possible galactic migration.
Enter the event fileNASA / EUROPA CLIPPER
The spacecraft coming home to leave again
Europa Clipper swings past Earth for the momentum it needs to reach an ocean hidden under ice.
Enter the event fileESA / PLATO
The next planet hunter opens 26 eyes
Plato will look for small planets around bright stars, where a planet's size is only part of the story.
Enter the event fileNASA / LUCY
Lucy meets its first Trojan asteroid system
Eurybates and its companion Queta are the next doorway into the history of the outer Solar System.
Enter the event fileSOLAR SCIENCE / AUGUST 2027
The day the corona comes into view
A total solar eclipse crosses southern Spain, North Africa, and the Arabian Peninsula, revealing the Sun's outer atmosphere along a narrow path.
Enter the event fileJAXA / MARTIAN MOONS EXPLORATION
MMX approaches Phobos
The next threshold is sustained exploration near Mars’s larger moon, before the rover deployment and sample collection.
Enter the event fileNASA / DRAGONFLY
A flying laboratory for Titan
The mission that could move between Titan's dunes and an ancient impact site is taking shape on Earth.
Enter the event fileAPOPHIS / EARTH CLOSE APPROACH
Apophis passes Earth safely
On April 13, 2029, a close encounter becomes a natural experiment in what Earth's gravity does to an asteroid.
Enter the event fileABOUT THESE CLOCKS
What, exactly, are we counting?
Mission schedules move. When an agency publishes only a month or an approximate window, the clock runs to the start of that window, not to an invented launch or arrival time. Even a published calendar date may lack a precise event time. Each file names its date source and explains the limit. The clock itself updates while this page is open; the schedule and reporting are reviewed by hand in new site releases.
When an event is confirmed, its file stays at the same address and becomes a record of what happened, what was measured, and what remains unresolved.