🚨 THE SKY DOME HAS NOT BEEN CONFIRMED BY NASA (SHOCKING!) ·
⚠ THIS MAP IS FLAT BUT THE UNIVERSE IS NOT ·
🔭 JWST CAN SEE 46 BILLION LIGHT-YEARS AWAY — ICE WALL NOT DETECTED ·
📡 SATELLITE SIGNALS COME FROM... SATELLITES (NOT SECRET TOWERS) ·
🌍 GALILEO GALILEI HAD SOMETHING TO TELL YOU ·
✨ REAL GALAXIES · REAL DISTANCES · REAL UNIVERSE · EARTH... IS ROUND ·
🛸 MILKY WAY: 100,000 LIGHT-YEAR DIAMETER · THE DISC IS GALACTIC, NOT EARTHLY ·
🌐 3D VERSION: alexio.tf/universul-observabil-3d
⭐ FAVORITE GALAXIES
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⌨ KEYBOARD SHORTCUTS
/ Search galaxy
R Reset view
L Toggle labels
S Sound on/off
C Scale comparator
H Heatmap
P Export PNG
T Guided tour
M Ruler / Measure
Q Cosmic quiz
D Random galaxy
F Favorites panel
G Gravitational groups
N Toggle language
O Powers of Ten
X Split screen
A Andromeda sim
Z Undo navigation
Esc Close any panel
` Toggle sidebar
? This cheatsheet
↑↓ Navigate search
Enter Select in search
Tab Navigate UI
Scroll Zoom in/out
⟲ UNDO — click or press Z
FLATNESS™ 35%
📏 CLICK GALAXY A
📏 INTER-GALACTIC DISTANCE✕
A — select a galaxy
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B — select a second galaxy
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Angular separation—
3D comoving distance—
Δ Radial distance—
Δ Lookback time—
Δ Redshift—
⚡ Signal travel time (c)—
📡 Round-trip time—
Select two galaxies on the map to measure separation in comoving space.
🌈 REDSHIFT SPECTRUM
🕸️ COSMIC FILAMENTS
🔗 GRAVITATIONAL GROUPS
🌡️ DENSITY HEATMAP
⊕ VIEWPORT CENTER
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⏳ Present · 0 years
Andromeda (M31) approaches at ~110 km/s. First contact: ~3.75 Gyr · Full merger ("Milkomeda"): ~7 Gyr · Star-star collision probability: nearly zero
⚖️ DIMENSIONAL COMPARISON✕
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VS
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Property
A
B
STEP 1 / 5
Skip tutorial
📸 PNG SAVED!
⚖️ SCALE COMPARATOR: LINEAR vs LOGARITHMIC✕
📏 LINEAR SCALE
Real distances — impossible to visualize
🌌 LOGARITHMIC SCALE
Current version — space compression
On a linear scale, if Andromeda were 1mm from the Milky Way, the CMB would require a screen ~18 m wide. The logarithmic scale compresses ~6 orders of magnitude onto the same screen.
Distance
Redshift z
Lookback time
STOP 1 / 10✕
⏳ TEMPORAL FILTERPresent (13.8 Gyr)✕
← Past (Big Bang) · Present → · Galaxies disappear as you approach the Big Bang