Chasing Eclipses

The Total Solar Eclipse of 2 August 2027

On Monday 2 August 2027 the Moon will pass directly in front of the Sun. Along a narrow path up to about 258 km wide, the sky will darken, the brightest stars and planets will appear, and the solar corona will be visible to the naked eye.

Totality first reaches land at about 08:44 UTC on the Atlantic coasts of northern Morocco and Andalusia, which is 08:44 by the clock in Tangier and 10:44 in Spain. From there the shadow sweeps across the Strait of Gibraltar, along North Africa, over the Nile Valley and across the Red Sea into Saudi Arabia, then crosses Yemen and the tip of Somalia before leaving the Earth over the Indian Ocean. The longest totality on land, a little over six minutes, falls in Egypt between Sohag and Luxor.

Countdown to totality in Spain

–days–hours–min–sec

Date
Monday 2 August 2027
Longest totality
6m 27s, near Nag Hammadi
Greatest eclipse
10:06 UTC, southern Egypt
Path width
up to about 258 km
Moon’s size vs Sun
7.9% larger (magnitude 1.079)
Saros series
136, same family as 2009 and 2045

The path of totality

Inside the dark band the Moon covers the Sun completely. Everywhere outside it, including Madrid, Lisbon, Cairo and Tunis, sees only a partial eclipse. Durations are for the city shown.

ALGERIALIBYASUDANMALINIGERCHADITALYTarifa4m 41sOran5m 11sSfax5m 43sLuxor6m 25sJeddah6m 03sALGERIASAUDI ARABIALIBYASUDANEGYPTMOROCCOMALINIGERTURKEYCHADIRAQGREECECádiz2m 54sAl Hoceima4m 32sOran5m 11sKasserine5m 30sSfax5m 43sSiwa Oasis5m 37sLuxor6m 25sJeddah6m 03sAbha6m 08s
Path of totality, where the Sun is completely coveredOutside the band, a partial eclipse only

Follow the shadow from Spain to Somalia

Drag the slider or press play to send the Moon’s shadow along its track. Just after sunrise over the Atlantic, the shadow skims the ground at several kilometres a second. By the time it reaches Spain it has slowed to about 1.4 km a second, and over Egypt, with the Sun almost overhead, to under 0.7 km a second. The slower the shadow moves, the longer totality lasts.

ALGERIASAUDI ARABIAMOROCCOLIBYASUDANEGYPTYEMENMALIIRANTUNISIANIGERCHAD
Time
Shadow over
Totality there
Shadow speed
Sun height
The shadow covers about 13,800 km of the Earth’s surface in 3 hours 22 minutes. Times are in UTC; values are for the centre line of the path.

How totality grows from west to east

The bars follow the path in the order the shadow arrives. Along the centre line, totality grows from under five minutes at the Strait of Gibraltar to 6m 27s over the Nile, then shortens over Arabia. Cities away from the centre line, such as Djerba, fall below that trend.

  1. CádizSpain2m 54s
  2. TangierMorocco4m 54s
  3. TarifaSpain4m 41s
  4. Al HoceimaMorocco4m 32s
  5. OranAlgeria5m 11s
  6. KasserineTunisia5m 30s
  7. SfaxTunisia5m 43s
  8. DjerbaTunisia4m 49s
  9. Siwa OasisEgypt5m 37s
  10. AsyutEgypt6m 10s
  11. LuxorEgypt6m 25s
  12. JeddahSaudi Arabia6m 03s
  13. AbhaSaudi Arabia6m 08s
Length of totality in selected cities, west to east, from our own calculation.

Totality by country

Spain4m 51sLongest in Ceuta, from 10:45 local time (UTC+2)21 cities with times Gibraltar4m 29sLongest in Gibraltar, from 10:45 local time (UTC+2)1 city with times Morocco4m 55sLongest in Tetouan, from 08:45 local time (UTC+0)11 cities with times Algeria5m 23sLongest in Khenchela, from 10:02 local time (UTC+1)11 cities with times Tunisia5m 43sLongest in Sfax, from 10:08 local time (UTC+1)12 cities with times Libya6m 13sLongest in Benghazi, from 11:27 local time (UTC+2)9 cities with times Egypt6m 27sLongest in Nag Hammadi, from 13:00 local time (UTC+3)9 cities with times Saudi Arabia6m 14sLongest in Al Lith, from 13:26 local time (UTC+3)10 cities with times Yemen5m 59sLongest in Sa’dah, from 13:38 local time (UTC+3)6 cities with times Somalia5m 32sLongest in Qandala, from 13:57 local time (UTC+3)4 cities with times

Every city compared

Two things decide how long totality lasts where you stand. The first is your distance from the centre line. Totality is longest along the middle of the band and shrinks quickly towards its edges, so a city near the edge can have a minute or two less than one on the centre line only a short drive away.

Position along the path matters too. The Moon’s shadow races fastest over the ground where the Sun is low, at the western end of the path, and slows down where the Sun is high in the sky, which on 2 August 2027 happens over Egypt in the early afternoon. As a result, the best spots in southern Spain get four to almost five minutes, while the Nile Valley gets more than six. Within each country below, cities are sorted from the longest totality to the shortest.

2027 eclipse cities. Column headers sort the table.
Nag HammadiEgyptTotal100%6m 27sTotality from 13:00totality beginsSun 82°
SohagEgyptTotal100%6m 26sTotality from 12:58totality beginsSun 81°
LuxorEgyptTotal100%6m 25sTotality from 13:01totality beginsSun 82°
QenaEgyptTotal100%6m 15sTotality from 13:01totality beginsSun 81°
Al LithSaudi ArabiaTotal100%6m 14sTotality from 13:26totality beginsSun 75°
BenghaziLibyaTotal100%6m 13sTotality from 11:27totality beginsSun 68°
AsyutEgyptTotal100%6m 10sTotality from 12:56totality beginsSun 81°
AbhaSaudi ArabiaTotal100%6m 08sTotality from 13:34totality beginsSun 71°
Al AbyarLibyaTotal100%6m 04sTotality from 11:28totality beginsSun 68°
Khamis MushaitSaudi ArabiaTotal100%6m 04sTotality from 13:34totality beginsSun 71°
JeddahSaudi ArabiaTotal100%6m 03sTotality from 13:22totality beginsSun 76°
Al QunfudhahSaudi ArabiaTotal100%6m 03sTotality from 13:29totality beginsSun 73°
Sa’dahYemenTotal100%5m 59sTotality from 13:38totality beginsSun 68°
SuluqLibyaTotal100%5m 59sTotality from 11:28totality beginsSun 68°
Al HazmYemenTotal100%5m 58sTotality from 13:41totality beginsSun 67°
AtaqYemenTotal100%5m 51sTotality from 13:47totality beginsSun 63°
MaribYemenTotal100%5m 48sTotality from 13:43totality beginsSun 66°
SfaxTunisiaTotal100%5m 43sTotality from 10:08totality beginsSun 56°
Kerkennah IslandsTunisiaTotal100%5m 42sTotality from 10:09totality beginsSun 57°
EdfuEgyptTotal100%5m 38sTotality from 13:03totality beginsSun 82°
Siwa OasisEgyptTotal100%5m 37sTotality from 12:42totality beginsSun 75°
Sidi BouzidTunisiaTotal100%5m 34sTotality from 10:06totality beginsSun 55°
NajranSaudi ArabiaTotal100%5m 34sTotality from 13:38totality beginsSun 68°
Marsa AlamEgyptTotal100%5m 33sTotality from 13:07totality beginsSun 81°
QandalaSomaliaTotal100%5m 32sTotality from 13:57totality beginsSun 57°
KasserineTunisiaTotal100%5m 30sTotality from 10:05totality beginsSun 54°
TocraLibyaTotal100%5m 24sTotality from 11:28totality beginsSun 68°
KhenchelaAlgeriaTotal100%5m 23sTotality from 10:02totality beginsSun 52°
Bou SaâdaAlgeriaTotal100%5m 22sTotality from 09:57totality beginsSun 49°
BatnaAlgeriaTotal100%5m 18sTotality from 10:00totality beginsSun 51°
Al MarjLibyaTotal100%5m 15sTotality from 11:29totality beginsSun 68°
RelizaneAlgeriaTotal100%5m 15sTotality from 09:52totality beginsSun 45°
TébessaAlgeriaTotal100%5m 15sTotality from 10:04totality beginsSun 53°
Al BahaSaudi ArabiaTotal100%5m 15sTotality from 13:29totality beginsSun 73°
GafsaTunisiaTotal100%5m 14sTotality from 10:05totality beginsSun 54°
OranAlgeriaTotal100%5m 11sTotality from 09:50totality beginsSun 43°
MeccaSaudi ArabiaTotal100%5m 10sTotality from 13:23totality beginsSun 76°
TiaretAlgeriaTotal100%5m 10sTotality from 09:53totality beginsSun 46°
BiskraAlgeriaTotal100%5m 08sTotality from 10:00totality beginsSun 51°
MostaganemAlgeriaTotal100%5m 05sTotality from 09:52totality beginsSun 44°
TetouanMoroccoTotal100%4m 55sTotality from 08:45totality beginsSun 38°
M’diqMoroccoTotal100%4m 55sTotality from 08:45totality beginsSun 38°
TangierMoroccoTotal100%4m 54sTotality from 08:44totality beginsSun 38°
FnideqMoroccoTotal100%4m 53sTotality from 08:45totality beginsSun 38°
CeutaSpainTotal100%4m 51sTotality from 10:45totality beginsSun 38°
DjerbaTunisiaTotal100%4m 49sTotality from 10:09totality beginsSun 57°
AsilahMoroccoTotal100%4m 49sTotality from 08:44totality beginsSun 38°
Aïn TémouchentAlgeriaTotal100%4m 48sTotality from 09:50totality beginsSun 43°
TarifaSpainTotal100%4m 41sTotality from 10:44totality beginsSun 38°
MelillaSpainTotal100%4m 40sTotality from 10:48totality beginsSun 41°
BoloniaSpainTotal100%4m 33sTotality from 10:44totality beginsSun 38°
Al HoceimaMoroccoTotal100%4m 32sTotality from 08:46totality beginsSun 40°
GibraltarGibraltarTotal100%4m 29sTotality from 10:45totality beginsSun 38°
AlgecirasSpainTotal100%4m 28sTotality from 10:45totality beginsSun 38°
Zahara de los AtunesSpainTotal100%4m 26sTotality from 10:44totality beginsSun 38°
La Línea de la ConcepciónSpainTotal100%4m 26sTotality from 10:45totality beginsSun 38°
LaracheMoroccoTotal100%4m 25sTotality from 08:44totality beginsSun 38°
El JemTunisiaTotal100%4m 25sTotality from 10:09totality beginsSun 56°
NadorMoroccoTotal100%4m 22sTotality from 08:48totality beginsSun 41°
ChefchaouenMoroccoTotal100%4m 20sTotality from 08:45totality beginsSun 39°
AlulaSomaliaTotal100%4m 20sTotality from 13:58totality beginsSun 56°
BarbateSpainTotal100%4m 18sTotality from 10:44totality beginsSun 38°
GabèsTunisiaTotal100%4m 15sTotality from 10:08totality beginsSun 56°
SaïdiaMoroccoTotal100%4m 10sTotality from 08:49totality beginsSun 42°
Vejer de la FronteraSpainTotal100%4m 08sTotality from 10:44totality beginsSun 38°
Tolmeita (Ptolemais)LibyaTotal100%4m 08sTotality from 11:29totality beginsSun 68°
BosasoSomaliaTotal100%4m 07sTotality from 13:58totality beginsSun 58°
SotograndeSpainTotal100%4m 07sTotality from 10:45totality beginsSun 38°
Conil de la FronteraSpainTotal100%4m 02sTotality from 10:44totality beginsSun 38°
TaifSaudi ArabiaTotal100%3m 56sTotality from 13:25totality beginsSun 75°
EsteponaSpainTotal100%3m 39sTotality from 10:46totality beginsSun 39°
Chiclana de la FronteraSpainTotal100%3m 29sTotality from 10:45totality beginsSun 38°
TlemcenAlgeriaTotal100%3m 21sTotality from 09:50totality beginsSun 43°
MarbellaSpainTotal100%3m 18sTotality from 10:46totality beginsSun 39°
JizanSaudi ArabiaTotal100%3m 13sTotality from 13:38totality beginsSun 70°
FuengirolaSpainTotal100%3m 11sTotality from 10:47totality beginsSun 39°
ZarzisTunisiaTotal100%3m 06sTotality from 10:11totality beginsSun 57°
AmranYemenTotal100%3m 04sTotality from 13:42totality beginsSun 67°
Cape GuardafuiSomaliaTotal100%2m 59sTotality from 14:00totality beginsSun 56°
CádizSpainTotal100%2m 54sTotality from 10:45totality beginsSun 37°
MahdiaTunisiaTotal100%2m 51sTotality from 10:10totality beginsSun 56°
KairouanTunisiaTotal100%2m 42sTotality from 10:08totality beginsSun 55°
Sana’aYemenTotal100%2m 34sTotality from 13:43totality beginsSun 67°
El QuseirEgyptTotal100%2m 31sTotality from 13:06totality beginsSun 81°
TozeurTunisiaTotal100%2m 07sTotality from 10:06totality beginsSun 54°
MálagaSpainTotal100%1m 50sTotality from 10:48totality beginsSun 39°
MotrilSpainTotal100%1m 39sTotality from 10:49totality beginsSun 40°
Jerez de la FronteraSpainTotal100%1m 35sTotality from 10:46totality beginsSun 38°
TajuraLibyaTotal100%1m 30sTotality from 11:16totality beginsSun 60°
OujdaMoroccoTotal100%1m 30sTotality from 08:50totality beginsSun 42°
NerjaSpainTotal100%1m 28sTotality from 10:48totality beginsSun 40°
KhomsLibyaTotal100%1m 19sTotality from 11:18totality beginsSun 61°
RondaSpainTotal100%1m 16sTotality from 10:47totality beginsSun 39°
TripoliLibyaTotal100%0m 47sTotality from 11:16totality beginsSun 60°
AlmeríaSpainPartial99.9%No totality–Peak at 10:51peakSun 41°
Al BaydaLibyaPartial99.9%No totality–Peak at 11:33peakSun 69°
MisrataLibyaPartial99.9%No totality–Peak at 11:20peakSun 62°
ConstantineAlgeriaPartial99.9%No totality–Peak at 10:04peakSun 51°
MonastirTunisiaPartial99.8%No totality–Peak at 10:11peakSun 56°
SousseTunisiaPartial99.8%No totality–Peak at 10:10peakSun 56°
AlgiersAlgeriaPartial99.8%No totality–Peak at 09:58peakSun 47°
TobrukLibyaPartial99.6%No totality–Peak at 11:38peakSun 72°
SafagaEgyptPartial99.5%No totality–Peak at 13:06peakSun 80°
DernaLibyaPartial99.2%No totality–Peak at 11:35peakSun 70°
Las KhoreySomaliaPartial99.2%No totality–Peak at 13:58peakSun 59°
GranadaSpainPartial99.1%No totality–Peak at 10:50peakSun 40°
MukallaYemenPartial99.1%No totality–Peak at 13:54peakSun 60°
YanbuSaudi ArabiaPartial98.9%No totality–Peak at 13:18peakSun 78°
RabatMoroccoPartial98.6%No totality–Peak at 08:45peakSun 37°
HurghadaEgyptPartial98.5%No totality–Peak at 13:04peakSun 80°
FesMoroccoPartial98.4%No totality–Peak at 08:47peakSun 39°
SevilleSpainPartial98.2%No totality–Peak at 10:47peakSun 38°
HammametTunisiaPartial98.2%No totality–Peak at 10:10peakSun 55°
SirteLibyaPartial97.9%No totality–Peak at 11:24peakSun 65°
CasablancaMoroccoPartial97.1%No totality–Peak at 08:44peakSun 36°
TunisTunisiaPartial97.0%No totality–Peak at 10:09peakSun 55°
HodeidahYemenPartial96.6%No totality–Peak at 13:44peakSun 68°
AdenYemenPartial96.1%No totality–Peak at 13:51peakSun 64°
ErigavoSomaliaPartial95.8%No totality–Peak at 13:58peakSun 60°
TaizYemenPartial95.8%No totality–Peak at 13:48peakSun 66°
CairoEgyptPartial94.7%No totality–Peak at 12:55peakSun 78°
MedinaSaudi ArabiaPartial94.4%No totality–Peak at 13:20peakSun 76°
LisbonPortugalPartial92.4%No totality–Peak at 09:44peakSun 35°
Socotra (Hadibu)YemenPartial92.4%No totality–Peak at 14:04peakSun 53°
GaroweSomaliaPartial92.1%No totality–Peak at 14:03peakSun 57°
MarrakechMoroccoPartial89%No totality–Peak at 08:43peakSun 36°
BerberaSomaliaPartial89%No totality–Peak at 13:55peakSun 63°
GhadamesLibyaPartial87%No totality–Peak at 11:10peakSun 56°
MadridSpainPartial86%No totality–Peak at 10:51peakSun 40°
HargeisaSomaliaPartial83%No totality–Peak at 13:55peakSun 63°
KufraLibyaPartial81%No totality–Peak at 11:46peakSun 77°
SabhaLibyaPartial79%No totality–Peak at 11:23peakSun 64°
RiyadhSaudi ArabiaPartial76%No totality–Peak at 13:32peakSun 67°
MogadishuSomaliaPartial63%No totality–Peak at 14:09peakSun 56°

Local clock time on 2 August 2027 when totality begins, or for a partial eclipse, the moment of greatest coverage.

What you will see

The white corona around the dark Moon during a total solar eclipse

For the first hour or so the Moon slowly covers the Sun, and the light gradually turns flat and strange. You need eclipse glasses for this whole partial phase. In the last minutes before totality the temperature drops, shadows sharpen, and bands of light and shade may ripple across the ground.

At second contact the last beads of sunlight vanish and totality begins. Only now is it safe to take your glasses off and look directly at the Sun. The corona spreads out around the black disc of the Moon, a sunset glow runs all the way round the horizon, and the brightest planets and stars come out. When the first bright point of sunlight returns, glasses go back on immediately.

The diamond ring at the end of totality, a burst of sunlight with long rays on one side of the Moon

Our minute-by-minute account of what happens during totality uses the real timings for Luxor.

Why 2027 is called the eclipse of the century

Totality on 2 August 2027 lasts up to 6 min 27 s on land. No total eclipse between 1991 and 2114 gives more time on land that ordinary travellers can reach. The 2009 eclipse in the same family lasted a little longer at greatest eclipse, but its longest totality fell over the open Pacific.

Three things line up to make it long. The Moon is close to Earth, so it looks large and covers the Sun with room to spare. Earth is near its farthest point from the Sun in early July, so the Sun looks small. And the shadow passes almost through the middle of the Earth’s disc, where the Sun is high and the ground, carried east by the Earth’s rotation, moves with the shadow and slows it relative to the surface.

  1. 1955

    20 June 19557m 13s

    Sri Lanka, India, Myanmar, Thailand and 4 more

  2. 1973

    30 June 19737m 08s

    Mauritania, Mali, Algeria, Niger and 7 more

  3. 1991

    11 July 19916m 58s

    United States, Mexico, Guatemala, El Salvador and 5 more

  4. 2009

    22 July 20096m 43s

    India, Nepal, Bangladesh, Bhutan and 2 more

  5. 2027

    2 August 20276m 27s

    Morocco, Spain, Algeria, Tunisia and 6 more

  6. 2045

    12 August 20456m 10s

    United States, Bahamas, Haiti, Dominican Republic and 6 more

The 2027 eclipse and its relatives in saros 136, each 18 years and 10 or 11 days apart. Durations are at greatest eclipse, from our own calculation.

Weather and sky conditions

August is one of the clearest months of the year along almost the whole path. According to climatologist Jay Anderson, cloud is almost unknown over the Egyptian and Libyan deserts in summer, and Siwa and Bahariya oases have almost no prospect of cloud at all. At Cádiz the Sun was visible on about 88% of August days, while coastal mist on summer mornings is the main risk around Tangier, Asilah and Melilla.

Dust matters more than cloud in places. Haze blown from the Sahara can soften the corona over inland Algeria and the Saudi coast south of Jeddah, while Sfax, Tangier and the Spanish coast usually have cleaner air.

Heat and travel in August

Totality over Egypt and Saudi Arabia comes in the early afternoon of a midsummer day. Luxor’s average high on 2 August is about 42°C (108°F), and afternoon readings close to 50°C (122°F) are possible in the desert. Plan shade, water and a place to rest after the eclipse, and keep children and older travellers out of the midday sun before totality.

Southern Spain is in peak holiday season, and the ferries across the Strait of Gibraltar carry the yearly summer migration between Europe and Morocco at the same time. Expect full ferries, busy roads and prices well above normal on the coast.

Eye safety

Look at the partial phases only through certified eclipse glasses or a solar viewer meeting the ISO 12312-2 standard. Sunglasses, however dark, do not protect the eyes. Cameras, binoculars and telescopes need a proper solar filter on the front. Our eye safety guide explains how to check glasses and when it is safe to take them off.

Photographing the eclipse

Silhouette of a photographer beside a long telephoto lens on a tripod against a low golden Sun

Practise at home before August. For the partial phases, a solar filter on the lens is essential. During totality, remove it and bracket your exposures, from fast shots for the inner corona and the diamond ring to longer ones for the outer streamers. Phones on a tripod handle the darkening landscape well, and a wide shot of people under the dark sky often becomes the photo you remember. Leave at least half of totality to watch with your own eyes.

Why being inside the path matters

A 99% partial eclipse is still a bright day; the remaining sliver of Sun is far too bright for the corona to appear. So the difference between places just outside the path and cities just inside it is enormous, even when they are only a short drive apart.

EgyptSafaga99.5%covered at 13:06, no totalitySpainGranada99.1%covered at 10:50, no totalityEgyptHurghada98.5%covered at 13:04, no totalitySpainSeville98.2%covered at 10:47, no totalityMoroccoCasablanca97.1%covered at 08:44, no totalityTunisiaTunis97.0%covered at 10:09, no totalityEgyptCairo94.7%covered at 12:55, no totalityPortugalLisbon92.4%covered at 09:44, no totalityMoroccoMarrakech89.2%covered at 08:43, no totalitySpainMadrid86.2%covered at 10:51, no totality

Coverage and times for more than 100 cities outside the path, from London and Paris to Riyadh and Mumbai, are in our guide to the partial eclipse of 2 August 2027.

Check your own street, beach or hotel

Type a city or tap the map for times to the second, the Sun’s height and a preview of the sky for any spot.

Planning ahead

A large crowd in silhouette on a seafront watching a crescent Sun setting over the sea

Accommodation inside the path, particularly in Luxor and along the Strait of Gibraltar, is already in demand. Book refundable rooms early, keep a car or transfer plan that lets you move away from cloud on the morning itself, and buy certified eclipse glasses before July 2027, when demand and fakes both peak.

Good questions

When is the 2027 total solar eclipse?
On Monday 2 August 2027. Totality reaches the coast of Spain at 10:44 local time and leaves the Horn of Africa a little over two hours later. Greatest eclipse is at about 10:06 UTC over southern Egypt.
How long does totality last in 2027?
Up to about 6 min 27 s by our calculation, in the Nile Valley around Nag Hammadi, between Sohag and Luxor. The best spots in southern Spain get four to almost five minutes, northern Morocco four and a quarter to five, and Jeddah about six.
Why is it called the eclipse of the century?
Its totality on easily reached land lasts longer than any other total eclipse between 1991 and 2114, and the path crosses easy-to-reach places with reliable summer weather, from the beaches of Cádiz to the temples of Luxor.
Can I see the 2027 eclipse from the UK, Ireland or the United States?
The UK and Ireland see a partial eclipse in the morning, with about a quarter of the Sun covered in Scotland and over two fifths on the south coast of England. North America sees nothing, because the eclipse happens during its night.
Is Cairo in the path of totality?
No. Cairo lies a few hundred kilometres north of the path and sees a deep partial eclipse. The nearest totality is in the Nile Valley around Asyut and Sohag, or at Siwa Oasis in the Western Desert.
Do I need eclipse glasses?
Yes, for every minute of the partial phases before and after totality. Only during totality itself, when the Sun is completely covered, is it safe to look with the naked eye. Outside the path, glasses stay on the whole time.
Where is the best place to watch?
The Nile Valley between Sohag and Luxor has the longest totality. For the clearest skies, head to the Egyptian and Libyan deserts, where August cloud is almost unknown. The easiest trip from Europe is to the coast around Cádiz and Tarifa, or to Tangier across the Strait.

Sources

  1. NASA Eclipse Web Site: Total solar eclipse of 2027 August 02
  2. Eclipsophile (Jay Anderson): Weather prospects for the total solar eclipse of 2027 August 2
  3. American Astronomical Society: How to view a solar eclipse safely
  4. Sky & Telescope: Plan for the 2027 eclipse of the century