Nothing yet. Merges, escapes and collisions land here.
State vector
N bodies0
sum m0
T kinetic0
|p|0
|v| max0
|v| rms0
softening e0
G1
TU / s1
zoom1
02Body Spawner
Mass
-
Radius
Drag on empty space to aim & launch. A click drops a stationary body.
Planet
mass-
speed-
radius-
|force|-
stage-
class-
variant-
track-
age-
envelope-
disk-
accretion-
jet power-
twin separation0.0000
03Key bindings
Fig. 012-D Newtonian field Velocity Verlet integrator
Mission-
Study
Occultation · reference & drills
Object cards
Messier, NGC and IC objects. Distances, magnitudes and sizes are published values, not measurements made here: each card says whether it was cross-checked against a catalogue table or entered from public sources only. Every glyph is a drawing of the class, not an image of the object. This is a general catalogue, not any competition list, and it is not affiliated with or endorsed by any competition.
Hertzsprung–Russell diagram
Click a star in the list to trace it
Evolution time
The scrubber ages the study world's own star, so its track on this diagram moves. It cannot touch your simulation.
Axes are fixed: 60 000 K at the left to 2 500 K at the right, and 10-6 to 106 Lsun. The letters along the top are spectral classes. The shaded regions, the mass markers and the main-sequence line are reference shapes from a short anchor table, not fits to the plotted stars.
Light curve
—
View inclination
Flux is the summed light of every body with the occluded fraction removed, using the projected overlap of each pair. Inclination 90° is edge-on (eclipses); 0° is face-on (none).
Equations
Each plot is evaluated from the formula printed above it. Drag anywhere across a plot, or use the slider under it, and the marker, the dashed guides and the sentence underneath all move together. These are textbook relations, not fits to anything in the simulation.
Eight things to try. Each one is checked by the simulation itself, so any order works.
Solved stays solved
Everything below is live. Nothing here is a screenshot. Close it and the field keeps moving.