Observe Mode and Asteroid Watch: Leaving the Horizon Behind

Click the Moon on the Real Sky map and the whole planetarium falls away. Suddenly you're not looking up at a small glowing dot from a horizon — you're hanging next to it in space, close enough to see its actual lit phase, with the real stars and constellations still behind it in the exact same orientation they were in a second ago. That's Observe mode, and it's one click away from any planet on the map.

What happens the instant you click a body

Clicking the Sun, Moon, or any of the eight planets rendered as 3D globes opens a full-screen close observation. The camera doesn't cut to some generic angle — it starts exactly on the line from Earth to that body, so the first frame you see is the same view you'd have had from the horizon, just pulled in close and blown up huge. From there the camera slowly orbits the globe on its own, drag to steer manually, wheel or pinch to move closer or farther within a fixed range. Let go of the drag and after a couple of seconds the automatic orbit picks back up where you left it, so the view never just sits frozen and forgotten.

The lighting on the globe isn't decorative, either. It's aimed along the real direction from the Sun to that body at that exact moment, which is why the Moon and Venus show you their true current phase up close, not a generic fully lit sphere. If it's a waxing crescent Moon on the sky map tonight, it's a waxing crescent Moon in Observe mode too.

The neighbors floating around each body

Once you're in close on one body, every other chart body appears around it as a clickable neighbor, sitting at its real relative direction with its real distance labeled. Click one and the observation travels there without dropping you back out to the planetarium first — you can hop from Mars to Jupiter to Saturn in three clicks, never once seeing the wide sky in between. The Moon is the one exception to the neighbor list: it only shows up if it's the body you're actually observing, not as a neighbor of something else, since from most other vantage points it would be lost in the glare.

Earth itself only ever appears here, never in the main sky — which makes sense, since the main sky is the view from Earth. Inside Observe mode it shows up labeled "Earth · home," and clicking it is the one neighbor click that doesn't travel you anywhere else — it closes the observation and returns you to the ordinary planetarium view instead.

Three ways to leave Observe mode and get back to the sky

Three ways to leave: the "← Back to sky" button, pressing Esc, or clicking the Earth neighbor described above. Esc is suppressed while you're in native browser fullscreen, specifically so one press doesn't accidentally fire twice and close two things at once. If the close-up view ever fails to load — a rendering hiccup, a dropped chunk — there's a "Try again" option that remounts a fresh copy behind an error boundary rather than leaving you stuck on a broken screen.

Asteroid Watch: the one live network call on the page

Everything described above runs entirely on data already sitting on your device. Asteroid Watch is the single exception. It's opt-in — you open it deliberately from the controls rail — and once open it makes the page's only runtime call out to a live server: a request to our own backend, which itself proxies NASA's NeoWs near-Earth object feed. The panel is titled "Asteroid Watch," subtitled "Near-Earth objects passing within the next 7 days," and while it's fetching it tells you plainly: checking the latest data from NASA.

What comes back, when it comes back cleanly, is a list of real close approaches: each object's name, an approximate size in meters, the miss distance in kilometers and in lunar distances, and its closing velocity in kilometers per second. Anything NASA classifies as potentially hazardous gets a small "watch-listed" tag next to its name. If nothing is due to pass in the next seven days, the panel says exactly that — the sky is quiet — rather than showing an empty list with no explanation.

If the fetch fails, the panel doesn't pretend nothing happened. It tells you live near-Earth data is unavailable right now, reassures you that the rest of the sky is drawn from data already on your device and only this one panel needed the network, and gives you a "Try again" button. That honesty about failure, rather than a silent blank space, is a small thing worth noticing on a page that otherwise works entirely offline.

Why there's no asteroid drawn in the actual sky

It would be tempting to plot those NASA objects as little markers in the 3D sky itself, next to the planets and constellations. The page deliberately doesn't, and the reasoning is straightforwardly honest: real near-Earth asteroids sit around magnitude 20 or fainter, which is many magnitudes past anything a human eye — or this map's own Bortle-scale-relevant star rendering — could ever show as a visible point. Drawing a glowing dot for one would be fiction dressed as data. A factual readout of name, size, distance, and speed is the honest version of that same information, and it's what Asteroid Watch gives you instead.

What this means for you tonight

Next time you're in the Sky chart and a placement catches your eye, don't just read the row — click it, and let Observe mode carry you there directly. If you've already spent time with how to find planets without a telescope, Observe mode is the closest this map gets to answering "what would that actually look like up close, tonight, from here" for any of the ten bodies it tracks. And if you want a genuinely different kind of surprise from the page, skip the planets for a night and open Asteroid Watch cold, with no expectation either way — some weeks it will tell you the sky is quiet, and some weeks it will hand you a real object, with a real name and a real miss distance, that is going to pass closer to Earth this week than you'd guess.