How Long Would It Take to Travel to Regulus?

Regulus is a quadruple star system 79 light-years away that marks the 'heart' of the constellation Leo. The primary star spins so fast it's almost tearing itself apart.

Distance 79.3 light-years
Star Type Quadruple star system (B8IVn)
Constellation Leo
Apparent Magnitude 1.4

How Far Is Regulus from Earth?

Regulus is 79.3 light-years from Earth. That is about 750 trillion km (466 trillion miles), or 5.02 million astronomical units.

Distance to Regulus in different units
Unit Distance
Light-years79.3
Kilometers750,000,000,000,000 km
Miles466,000,000,000,000 miles
Astronomical units (AU)5,020,000 astronomical units
Parsecs24.3

Light from Regulus takes 79.3 years to reach Earth, so the light you see tonight left Regulus 79.3 years ago.

Voyager 1, the fastest object humans have sent into deep space, travels at about 17 km/s. It would need about 1.4 million years to cover this distance.

Time Dilation Formula Calculator

Spacecraft accelerates continuously throughout the journey. Realistic for ion drives or theoretical propulsion.

Distance to Regulus
Speed vs Time
This chart shows how quickly you accelerate to a fraction of the speed of light over time.
Distance vs Time
Shows distance covered (in light-years) over time.
Traveler's vs Observer's Time
Shows how time experienced by the traveler differs from time on Earth.
Energy Requirement vs Distance
Shows the (simplified) energy requirements for maintaining relativistic travel as distance increases.
Doppler Shift vs Time
Shows how the Doppler effect changes observed wavelengths over time.
Velocity vs Distance
Shows how your speed changes as you travel further from your starting point.
Lorentz Factor vs Time
Shows how the Lorentz factor (γ) grows over time as relativistic effects increase.
Proper vs Observer Distance
Shows how distance measurements differ between the traveler's frame and the observer's frame.

Facts About Regulus

Notable For: Heart of the Lion, 21st brightest star

Frequently Asked Questions

How long to travel to Regulus?

At light speed, it would take 79 years to reach Regulus. At 1g constant acceleration with deceleration, a traveler would experience about 28 years.

Why does Regulus spin so fast?

Regulus rotates every 16 hours, compared to the Sun's 25 days. This extreme rotation flattens the star significantly and nearly reaches the breakup velocity.

How far away is Regulus?

Regulus is 79.3 light-years from Earth, which is about 750 trillion km or 466 trillion miles. Light from Regulus takes 79.3 years to reach us.

How many light-years is Regulus from Earth?

Regulus is 79.3 light-years from Earth. One light-year is about 9.46 trillion km, the distance light travels in one year. In parsecs, Regulus is about 24.3 parsecs away.

Explore Similar Destinations

Wolf 359 7.86 light-years Aldebaran 65.3 light-years Castor 51 light-years Kepler-442 112 light-years

How to Use This Calculator

This time dilation calculator lets you enter a distance in light-years and acceleration in m/s² to see how time dilation affects your journey. It shows differences between traveler and observer times, maximum velocity, energy requirements, Doppler shift, Lorentz factor, and how distances vary between reference frames. Charts appear after you calculate.

Results

  • Traveler's Time: How much time the person on the spaceship experiences
  • Observer's Time: How much time passes on Earth during the journey
  • Maximum Velocity: The highest speed reached, as a fraction of light speed

Interactive Charts

  • Speed vs Time: How quickly you accelerate towards light speed
  • Distance vs Time: How far you've traveled over time
  • Traveler's vs Observer's Time: Compare time passage between Earth and spaceship
  • Energy Requirement vs Distance: How much energy is needed as you travel further
  • Doppler Shift vs Time: How light wavelengths change during your journey
  • Velocity vs Distance: Your speed at different distances
  • Lorentz Factor vs Time: How much time dilation increases with speed
  • Proper vs Observer Distance: How distance measurements differ between frames

What is Time Dilation?

Time dilation is an effect from Einstein's theory of special relativity. The faster you move, the slower time passes for you compared to someone standing still. At 90% of light speed, time passes about 2.3 times slower for the traveler than for someone on Earth.

What is the Time Dilation Formula?

The Time Dilation Formula is:

t' = t / √(1 - v²/c²)

Where:
t' = time measured by the observer (on Earth)
t = time experienced by the traveler
v = velocity of the traveler
c = speed of light (299,792,458 meters per second)