What You’re Looking At
This dashboard computes real‑time scientific and environmental metrics
entirely on the server—no external APIs, no data leaks. Every number you see is derived
from well‑established formulas and constants. The glossary below explains what each
term means in plain language, so you can interpret the data with confidence.
No external calls
Real‑time PHP
Privacy‑first
Astronomical & Seasonal Terms
Moon Phase
The apparent shape of the Moon as seen from Earth, determined by its position relative to the Sun. It cycles from New Moon (invisible) to Full Moon (fully illuminated).
Waning Gibbous
Moon Illumination
The percentage of the Moon’s visible disk that is lit by the Sun at this moment.
84%
Moon Age
The number of days since the last New Moon. Ranges from 0 to ~29.53 days.
18.7 d
Sunrise / Sunset (London)
The local times when the upper edge of the Sun appears/disappears above the horizon, calculated for London (51.5°N).
05:53 / 17:51
Day Length
The total time from sunrise to sunset on a given day.
11:58
Current Season
The astronomical season (Spring, Summer, Autumn, Winter) for the Northern Hemisphere, based on solstices and equinoxes.
Autumn
Day Progress
The fraction of the current day that has elapsed, expressed as a percentage.
16.2%
Oceanographic Indicators
Tidal Force Index
A relative measure (0‑100) of the combined gravitational pull of the Moon and Sun on Earth’s oceans. Higher values indicate stronger tides.
16.5%
Spring Tide
Occurs when the Sun and Moon align (new or full moon), producing the highest high tides and lowest low tides. “Spring” refers to the tidal spring, not the season.
No
Wave Energy Index
A proxy for the potential energy available in ocean waves, influenced by wind and lunar forcing.
90
Mean Ocean Depth
The average depth of the global ocean, approximately 3.7 km.
3.688 km
Ocean Volume
The total volume of the world’s oceans, about 1.332 billion cubic kilometres.
1.332 ×10⁹ km³
SST Proxy
An estimate of average sea surface temperature (°C) based on the day of year, using a sinusoidal model.
14.5 °C
Cosmic & Hubble Insights
Days since Hubble Launch
The number of days that have passed since the Hubble Space Telescope was deployed on April 24, 1990.
13,302
Light Travelled since Launch
The distance light has travelled (in light‑years) during Hubble’s operational lifetime.
36.4193 ly
Hubble Constant (H₀)
The rate of expansion of the universe, measured in kilometres per second per megaparsec. A higher value means faster expansion.
70 km/s/Mpc
Age of Universe (est.)
The approximate age of the universe since the Big Bang, derived from the Hubble constant.
13.97 Gyr
Observable Radius
The maximum distance from Earth from which light has had time to reach us since the Big Bang (≈ 13.8 billion light‑years).
14 billion ly
Recession @ 100 Mpc
The recessional velocity of a galaxy located 100 megaparsecs away, calculated using Hubble’s law (v = H₀ × d).
7,000 km/s
Global Statistical Snapshot
Orbital Distance Today
The distance Earth has travelled along its orbit since midnight (UTC), based on an average speed of 29.78 km/s.
416,741 km
Population Growth (est.)
An estimate of the net increase in global population since midnight, using a rate of ~2.5 persons per second.
+34,985
CO₂ Emissions
The approximate amount of carbon dioxide (in metric tons) emitted globally since midnight, based on a rate of ~1,100 tons per second.
15,393,400 tons
Days Since Unix Epoch
The number of days that have passed since January 1, 1970 (Unix time).
20,720
Seconds to Midnight (UTC)
The number of seconds remaining until the next day begins at 00:00 UTC.
72,406
Year Type
Whether the current year is a leap year (366 days) or a common year (365 days).
Common Year
Solar System Scale
Earth–Sun Distance
The current distance between Earth and the Sun, expressed in Astronomical Units (AU) and kilometres. 1 AU ≈ 149.6 million km.
1.00336 AU (150,100,982 km)
Solar Irradiance
The amount of solar power received per square metre at the top of Earth’s atmosphere. It varies with Earth–Sun distance.
1351.9 W/m²
Light Travel Time
The time it takes sunlight to travel from the Sun to Earth at the current distance.
8.34 min
Orbital Speed
Earth’s instantaneous orbital velocity around the Sun, which varies slightly due to the elliptical orbit.
29.68 km/s
Year Progress
The percentage of the current sidereal year (365.256 days) that has elapsed.
72.9%
Days to Perihelion / Aphelion
The number of days until Earth reaches its closest (perihelion) or farthest (aphelion) point from the Sun.
Peri: 101.8 d / Aph: 285.8 d
Position Status
A qualitative description of whether Earth is currently closer or farther from the Sun than average.
Farther than average (near aphelion half)
Advanced Research Metrics
Earth Effective Temperature
The theoretical blackbody temperature of Earth if it had no atmosphere and absorbed all incoming solar radiation. It is a baseline for greenhouse effect comparisons.
254.15 K
Relativistic Time Dilation (γ)
A relativistic factor accounting for the slowing of time due to Earth’s orbital motion. Very close to 1; the daily effect is a few nanoseconds.
1.000000004934
Dilation (ns/day)
The cumulative time dilation experienced by a clock on Earth’s surface compared to a stationary observer, in nanoseconds per day.
426276.8 ns
Critical Density (ρc)
The density required for the universe to be flat (neither expanding nor contracting forever). Derived from the Hubble constant.
9.204e-27 kg/m³
Orbital Specific Energy
The total mechanical energy (kinetic + potential) per unit mass of Earth in its orbit. Negative value indicates a bound orbit.
-4.421e+8 J/kg
Solar Power on Earth
The total solar power intercepted by Earth’s cross‑sectional area, expressed in petawatts (1 PW = 10¹⁵ W).
172.4 PW
Redshift (z) @ 50 Mpc
The approximate cosmological redshift of a galaxy 50 megaparsecs away, assuming its recessional velocity follows Hubble’s law.
≈ 0.01167
Mathematical Constants
π (Pi)
The ratio of a circle’s circumference to its diameter. A fundamental constant in mathematics and physics.
3.1415926536
e (Euler’s Number)
The base of the natural logarithm, used extensively in calculus, finance, and exponential growth models.
2.7182818285
Golden Ratio (φ)
An irrational number often found in art, architecture, and natural patterns; approximately 1.618.
1.6180339887
Current Second Prime?
Indicates whether the current second of the minute (0‑59) is a prime number. A simple mathematical curiosity.
No
Generated: 2026-09-24 03:53:14 UTC
Memory: 2 MB
Render: 0.48 ms