Solar System Live

Solar System Live is a server-generated orrery that turns a compact bank of controls into a solar-system chart and an ephemeris table. Pick a time, viewpoint, observing location, or orbital scale, then use the result to compare where the planets sit without wading through cinematic flourishes.

What is Solar System Live?

The page feels like a scientific instrument left conveniently plugged into the Web. Its full-system output pairs a generated chart with rows of right ascension, declination, distance, altitude, azimuth, and whether each body is up or set. Controls let you swap between the inner and full system, rotate the heliocentric viewpoint, change the orbit scale, and substitute planet images for symbols. The deeper rabbit hole is orbital-element input: paste suitable data for an asteroid or comet and the tool can add that visitor to the planetary traffic diagram.

What you can do there

• Generate a solar-system view for a chosen time and viewpoint
• Inspect ephemeris data for an observing location
• Plot an asteroid or comet from orbital elements

Why we picked it

Solar System Live makes orbital geometry tangible without turning astronomy into a glossy slideshow. The date and location controls support quick curiosity, while the ephemeris and comet-tracking options leave plenty for a classroom demonstration or a patient backyard observer. Its proudly old-school form-and-GIF machinery is part of the charm, but the useful part is the amount of sky math packed behind one Update button.

How to get the most from it

Start with the full-system view and change only the date so the planets' movement is easy to compare. Switch to the inner system when Mercury through Mars bunch together, and enter your latitude and longitude if altitude and azimuth matter. Each control label leads to focused help, so use those pages before experimenting with stereo views or orbital elements.

Good to know

Most dates span 4713 B.C. through A.D. 8000, but the documented Pluto calculation covers only 1885 through 2099. Results are generated by a server-side C program as GIF-based pages, so expect a compact form and table rather than a fluid 3D simulation. The current destination and output opened without a login prompt; device behavior and accessibility have not been established.

Who made it, and when?

John Walker is the credited creator or organization.