The Cosmos at a Glance
1.4 million km
Solar diameter
384,400 km
Earth to Moon distance
10 MK
Hottest flare plasma
3,000 km/s
Fastest CME speed
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The Sun
A sphere of plasma photographed by NASA's SDO every 12 seconds in 11 channels, plus the SOHO coronagraph, from the roughly 5,800 K visible surface to 10 MK flare plasma. Each wavelength shows a different layer of the Sun. See the 12 wavelengths explained.
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The Moon
Completing a cycle every 29.53 days. Lumara uses the lunar series from Jean Meeus's Astronomical Algorithms to calculate phase, illumination, rise and set, and distance offline. See the moon phase tonight, or plan ahead with the 2026 full moon calendar.
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Space Weather
Solar flares rated B to C to M to X. Coronal mass ejections at up to 3,000 km/s. Geomagnetic storms on the G1 to G5 scale that drive the aurora and northern lights. Lumara lists all three from NASA's DONKI catalog, which posts events a few hours after they happen, and shows the Kp index live from NOAA SWPC. See the space weather guide, check today's solar flares, or whether the northern lights are out tonight.
Take Lumara With You
Lumara 2.0 is free on Android and iPhone. It adds what this page cannot: Home Screen widgets for the Moon and solar storms (on iPhone, iOS 17 or later), a Moon calendar to 2030, the Moon on any date from 1900 to 2100, and alerts for full moons, lunar eclipses and solar storms that stay off until you turn them on.
Lumara 2.0 on Android: tonight's Moon, the Moon calendar and the widgets. What is new in Lumara 2.0
☼ 12 Solar Wavelengths
🌙 Moon Calendar to 2030
⚡ Widgets and Alerts
🔒 Zero Tracking
No accounts. No ads. No analytics SDKs, no ad networks, no cookies. Free forever.
Your city stays on your phone, and Lumara never sends it anywhere. The app asks NASA, NOAA and the other servers named in the privacy policy for its pictures and data, and sends nothing about you with those requests. The app collects nothing at all.
Two things on this website are worth naming plainly. To see which pages get read, each page load pings a counter we run ourselves, recording only the page path and the day: no cookies, no IP address, no browser details, no identifier of any kind, so nothing links a view to a person. And two panels contact Google services: the typefaces are served by Google Fonts, and the ISS video streams from YouTube automatically when the dashboard opens, so Google receives your IP address and browser on each visit. Read the full privacy policy.