Series 01 Concept · Live sky instruments · Physical editions in development
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SIDEREAL CLOCKS

Astronomical timepieces for architecture & interiors

The Turning Earth

Twin Poles: two poles, one spin

Watch both poles at once: the same Earth turns clockwise beneath the Southern Cross and anticlockwise beneath Polaris. Replay 31 March 2026 to watch every sky hand point straight up at its own midnight.

South Pole · clockwise ↻The Crux Movement
Arctic · anticlockwise ↺The Northern Movement

Both poles at once: the same Earth, the same moment, turning clockwise beneath the Southern Cross and anticlockwise beneath Polaris.

Why the directions differ

From above Antarctica, the Earth turns clockwise. From above the Arctic, the same rotation appears anticlockwise. These are two viewpoints of one planet at one instant.

The same clocks on both dials

Both views use the same twenty-four meridians and simulated time. Select a clock on either dial to inspect its location and local standard time. The shared readout makes the two viewpoints easy to compare.

Time stays clockwise

Every clock keeps ordinary time clockwise. Its sky hand follows the local sky instead: clockwise for the southern hemisphere and anticlockwise for the northern hemisphere.

Compare a midnight

Choose Replay 31 March 2026, then pause when a clock reaches the gold midnight marker. The same calibrated meridian reaches midnight in both views, even though the maps turn in opposite directions.

The 24 midnight-zero meridians

Listed in the order midnight reaches them. Latitude never moves the hand, so each place is a real spot on its meridian. Your zone is highlighted.

ZoneMeridianLatitudePlace on the meridianNote
UTC+12178.7214° E17.70° SOff Ovalau, FijiAt sea, ~1.7 km off the west coast of Ovalau.
UTC+11163.6804° E19.70° SBelep Islands, New Caledonia
UTC+10148.6393° E33.00° SCumnock, New South WalesReference anchor: Parkes Observatory latitude, 35 km due east of the dish.
UTC+9133.5982° E34.58° NOkayama Astrophysical Observatory, JapanThe observatory dome is ~350 m west of the meridian.
UTC+8118.5572° E32.07° NNanjing (Pukou), China
UTC+7103.5161° E13.41° NSiem Reap Province, Cambodia
UTC+688.4750° E24.37° NPaba, Rajshahi, Bangladesh
UTC+573.4340° E33.90° NMurree, Pakistan
UTC+458.3929° E23.59° NMuscat (Bawshar), Oman
UTC+343.3518° E43.49° NNizhny Chegem, Kabardino-Balkaria, Russia
UTC+228.3108° E25.75° SPretoria (Mamelodi), South Africa
UTC+113.2697° E52.52° NBerlin (Charlottenburg), Germany
UTC+01.7714° W51.17° NAmesbury, Wiltshire (by Stonehenge)
UTC−116.8125° W28.30° NSantiago del Teide, TenerifeNo UTC-1 land on this meridian; the Canaries keep UTC+0.
UTC−231.8535° W72.58° NGreenland ice sheet
UTC−346.8946° W23.19° SJundiai, Sao Paulo, Brazil
UTC−461.9357° W16.24° SConcepcion, Santa Cruz, Bolivia
UTC−576.9767° W38.90° NWashington, D.C.
UTC−692.0178° W30.22° NLafayette, Louisiana
UTC−7107.0589° W38.55° NGunnison County, Colorado
UTC−8122.0999° W37.39° NMountain View, California
UTC−9137.1410° W58.66° NMount Crillon, Fairweather Range, Alaska
UTC−10152.1821° W16.44° SOff Maupiti, French PolynesiaAt sea, ~5 km east of Maupiti reef.
UTC−11167.2231° W53.60° NUnalaska Island, AlaskaNo UTC-11 land on this meridian; Alaska keeps UTC-9.
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