Andabien

Okay, let’s do the math.

• The nearest star, i.e solar system, Proxima Centauri, is 4 ¼ light years away. It would take light four and a half years to reach Earth from there, clearly, traveling at the speed of light.
• Juno Spacecraft,
  • https://www.missionjuno.swri.edu/earth-flyby/story/how-fast-can-juno-go
    • When arriving at Jupiter, the planet's gravity pulls in Juno faster and faster until the spacecraft reaches a speed over 250,000 kilometers per hour (150,000 miles per hour).
  • https://www.popsci.com/how-juno-will-get-into-orbit-around-jupiter/
    • After a 1.74 billion mile journey, NASA’s Juno spacecraft is due to arrive at Jupiter on the fourth of July. It will be the fastest spacecraft ever when it arrives, traveling at 165,000 miles an hour
• Parker Solar Probe
  • launched in 2018, will achieve 430,000 mph by 2024, approaching the Sun.
  • https://www.space.com/41447-parker-solar-probe-fastest-spacecraft-ever.html
• Nearest exoplanets
  • Wolf 1061c, about 13.8 light-years from Earth
  • Gliese 832 c, 16 light-years from Earth
  • Gliese 667Cc, 22 light-years from Earth.
  • TRAPPIST-1d, approximately 40 light-years away from Earth
• Therefore:
  • Speed of light: 671 million miles per hour
  • Fastest space travel: 165,000 miles per hour
  • 165,000/671,000,000 = .000245, meaning, our fastest space ship can travel at .000245 times the speed of light.
  • 13.8/.000245 = 563 centuries for us to travel to the nearest exoplanet.
  • 4.25/.000245 = 173 centuries to reach the nearest star.