How long would it take a commercial airplane to reach each planet

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The travel times for a commercial airplane to reach each planet are theoretical since airplanes are not capable of interplanetary travel. However, I can provide the travel time for a hypothetical scenario assuming a constant speed of approximately 900 km/h (559 mph) and a straight path without considering the actual space travel technology, the vast distances, or the fact that airplanes require an atmosphere to fly in.

Please note that these times are highly unrealistic and do not account for the actual speeds of spacecraft, the need for constant acceleration, deceleration, and the time it would take to overcome Earth's gravity and the gravity of other planets, as well as the time it would take to traverse the vast distances between planets.

1. Mercury: The average distance from Earth to Mercury is approximately 58 million kilometers (36 million miles). At 900 km/h, it would take about 64.4 days to reach Mercury.

2. Venus: The average distance from Earth to Venus is approximately 108 million kilometers (67 million miles). At 900 km/h, it would take about 120 days to reach Venus.

3. Earth (for comparison): The circumference of Earth is approximately 40,075 kilometers (24,901 miles). At 900 km/h, it would take about 44.5 hours to circumnavigate the globe.

4. Mars: The average distance from Earth to Mars is approximately 225 million kilometers (140 million miles). At 900 km/h, it would take about 249.5 days to reach Mars.

5. Jupiter: The average distance from Earth to Jupiter is approximately 628 million kilometers (390 million miles). At 900 km/h, it would take about 700 days (or about 1.9 years) to reach Jupiter.

6. Saturn: The average distance from Earth to Saturn is approximately 1.2 billion kilometers (746 million miles). At 900 km/h, it would take about 1,334 days (or about 3.65 years) to reach Saturn.

7. Uranus: The average distance from Earth to Uranus is approximately 2.87 billion kilometers (1.78 billion miles). At 900 km/h, it would take about 3,187 days (or about 8.75 years) to reach Uranus.

8. Neptune: The average distance from Earth to Neptune is approximately 4.5 billion kilometers (2.8 billion miles). At 900 km/h, it would take about 5,000 days (or about 13.68 years) to reach Neptune.

9. Pluto (now considered a dwarf planet): The average distance from Earth to Pluto is approximately 5.9 billion kilometers (3.67 billion miles). At 900 km/h, it would take about 6,555 days (or about 17.97 years) to reach Pluto.

For actual space travel, speeds are significantly higher. For instance, the New Horizons spacecraft that flew by Pluto in 2015 traveled at approximately 50,000 km/h (31,000 mph), which is more than 50 times faster than a commercial airplane.

SpaceX's Starship, once fully developed and capable of interplanetary travel, is designed to reach much higher speeds (around 25,000 mph or 40,000 km/h) and could potentially reach Mars in a much shorter time frame than the 6 months it currently takes with our best technology, which is the time it takes when the planets align for the shortest possible trip. The 26-month periodicity you mentioned is likely in reference to the synodic period of Mars, which is the time it takes for Earth and Mars to align in the same direction from the Sun, not the actual travel time of the Starship.