LAW I
Orbits are ellipses
The Sun sits at one focus, not the centre. The planet swings closest at perihelion and farthest at aphelion.
r = a(1 − e²) / (1 + e cos ν)
Open planetary science · runs in your browser
The solar system, computed.
Every planet behind this text sits where it really is today, solved from orbital elements on every frame, then set running forward in time. Scroll to fly through it. The same engine powers four research tools for planetary surfaces, rover missions, landing sites and mission data.
Seven instruments, one lab
Each tool opens with a working example, so you can see what it does before you bring your own images, terrain or data.
00 · KEPLER ORRERY
A 3D solar system that does the maths live
Every planet spins on its real axis and follows an orbit solved from Kepler's equation. The readout shows speed, distance and anomaly angles as they change, and logs perihelion, aphelion and retrograde loops the moment they happen.
Where is each planet right now, and how is it moving? Open the orrery
05 · आज रात का आसमान · TONIGHT'S SKY
Which planets can you see tonight?
Pick your city and get tonight's planets: when they rise and set, which direction to look, how high, and the Moon's phase, in Hindi and English. अपने शहर से आज रात का आसमान देखिए।
What can I see from my rooftop tonight? See tonight's sky
06 · MARSWALK PLANNER · NASA CHALLENGE
Plan the first human walk on Mars
A layered map of Jezero Crater that stacks terrain, minerals, rock cover, radio coverage and walk-back limits from NASA missions, then plans a walk to science targets and checks it against suit oxygen, daylight and today's Mars weather.
Can an astronaut reach the delta and get home safely? Plan a Marswalk
01 · ANOMALY HUNTER
Find what changed between two images
Aligns before and after images of the same ground, filters out camera defects, and ranks new craters, streaks and bright spots by confidence.
Did something new appear on this surface? Hunt for anomalies
02 · MISSION SURVIVAL
Stress-test a rover before it flies
Runs hundreds of simulated missions through dust storms, freezing nights and worn-out parts, then ranks the design changes that save the most missions.
What will most likely end this mission, and what fixes it? Run the simulator
03 · LANDING SITES
Weigh safety against science
Scores every point on a terrain model for slope and roughness, for how much geological variety a rover could reach, and for how far the safety estimate can be trusted.
Where can we land safely and still learn the most? Score landing sites
04 · DISCOVERY ENGINE
Sort real discoveries from data glitches
Connects measurements from different missions, flags surprises, and tests each one for replication, calibration changes and observing-time bias before suggesting what to check next.
Is this anomaly real, or a processing artifact? Open the engineThree laws run everything you see
Johannes Kepler worked these out from Tycho Brahe's naked-eye records in the early 1600s. The lab solves them, live, for every planet on every frame.
LAW II
Equal areas in equal times
Each coloured wedge takes the same time to sweep. Near the Sun the planet races to cover it; far out it crawls.
M = E − e·sin E
LAW III
Farther out, slower and longer
A planet's year squared grows with its distance cubed. All eight planets fall on one straight line.
T² ∝ a³
Race a beam of sunlight
Light leaves the Sun now. Watch when it reaches each planet at today's real distances, sped up 600 times.
TIME SINCE LEAVING THE SUN0 min 00 s
Distances along the track are drawn on a square-root scale so the inner planets don't overlap. Times are exact for today's positions.
Tested on answers we already knew
Every tool ships with a sample that has the truth planted inside it, so its results can be checked rather than trusted.
50/ 50
Surface changes recovered
Five planted changes in each of ten random image pairs. The camera's stuck pixel column was screened out every time.
6/ 6
Data catalogs judged correctly
Each catalog hides a real storm, a real warm spot, a calibration error, a bad frame and an unexplained signal. All six were classified right, with no false findings.
3,300missions
Simulated per design check
One baseline run plus eleven design variants, all replaying the same storms and part failures so the comparison is fair.