THE SOLAR SYSTEM: DISTANCES & TRAVEL TIMES
THE SOLAR SYSTEM – TRAVEL NUMBERS
When I was 10 years old, my entire universe was something we call Planet Earth. It is made up of continents, islands, and oceans. That was all I knew, and at that point in my young life, I thought I knew everything I needed to know.
But my life changed forever when our 5th grade teacher, Mrs. Seligson, took our class on a trip to the fantastic Hayden Planetarium. I was both stunned and impressed to learn the planet earth was just one of 9 planets, which orbit around a star we call the Sun. The Sun and those 8 planets make up the Solar System.
Note: Many scientists don’t consider Pluto a planet. They describe Pluto as a “Dwarf Planet”.
That fascinating new information rocked my world, but what I would learn next, was absolutely stunning. I also learned during our trip to the Hayden Planetarium, the Solar system, as large as it is, makes up just a tiny fraction of something much larger, called the Universe. Wow!
Prior to that trip, I had no idea that our planet, along with the entire Solar System, make up just tiny part of that amazing, but impossible to imagine Universe. From that point on, I read every book I could find in the public library about the Universe.
I quickly learned the Solar System resides in something called a Galaxy, and our galaxy is called the Milky Way. I will write about mind-boggling numbers on the Milky Way Galaxy in another article. But just for now, you need to know there are billions of other solar systems just in our galaxy.
What does that tell you about the odds of finding human life on other planets?
It’s been a long time since I was a fifth grader, but even today, there are still many unanswered questions about the Universe. But thanks to the James Webb Space Telescope, we continue to learn so much that is literally mind boggling. That telescope will continue to reveal more information for years to come.
I’m happy to say I’m just as excited today, learning about the Universe, as I was as a 5th grader during that first visit to the Hayden Planetarium. Thank you, Mrs. Seligson, for changing my life forever.
Before we move on to some mind-boggling numbers, let me say the following. Here is the best scientific estimate, which tells us the Universe is approximately 13.7 billion years old. Please don’t ask me what was there before the universe. One interesting theory is the concept of parallel universes.
The James Webb Space Telescope has definitely helped us understand, to some extent, the size and magnitude of the Universe. However, there is still so much we don’t know and will never know. But there is a lot we’ve learned recently, and some of those facts are mind boggling. If you’re interested, keep reading my future articles.
Before we get into the truly incredible numbers you will learn about in my next article, let’s start with trying to comprehend numbers just for the Solar System. Please keep in mind, we are using manned spacecraft numbers. Unmanned rockets can travel much faster.
In addition, the numbers posted below are all estimates, which can vary, depending on where the planets are in their orbits. It also depends on the source and methodology used to calculate the time. Therefore, the numbers can vary by a wide margin, depending on who is making the calculations and when the trip is made.
However, these approximate numbers will give you a pretty good idea of how far away the other planets are from earth. Remember, the planets are always orbiting the sun, so their distance from earth is changing non-stop.
Even though the Solar System makes up just a tiny fraction of the Universe, the numbers are still massive.
SOLAR SYSTEM NUMBERS
- As most of you probably already know, the earth is approximately 94 million miles from the Sun.
- It takes about 8 minutes and 20 seconds for sunlight, obviously traveling at the speed of light, to travel from the Sun to Earth.
- Even though it appears as if you could travel in a helicopter to the moon, the journey would take 3 Days in a manned spacecraft.
- The 2 closest planets to Earth are Mercury and Venus.
- MERCURY: Although it’s actually far more complex, in theory, it would take a manned spacecraft 7-9 months to travel approximately 49 million miles from earth to Mercury.
- VENUS: It is approximately 38 million miles from earth to Venus. The trip would take about 3-5 months in a manned spacecraft.
- MARS: It is approximately 51 million miles from earth. It would take about 7-9 months to travel from Earth to Mars in a manned spacecraft.
- JUPITER: It is about 367 million miles from earth. It would take approximately 4-6 years to travel from Earth to Jupiter in a manned spacecraft.
- SATURN: It is about 750 million miles from earth. It would take about 5-7 years to travel from Earth to Saturn in a manned spacecraft.
- Uranus: It is about 7 billion Miles from earth. It would take about 9.5 years to travel from Earth to Uranus in a manned spacecraft.
- NEPTUNE: It is about 7 billion miles from earth. It would take about 11-12 years to travel from Earth to Neptune in a manned spacecraft.
- PLUTO: It is about 2 billion miles from earth. It would take approximately 12-15 years to travel from Earth to Pluto in a manned spacecraft.
As Large as the above numbers are, our Solar System is just one of billions located in the Milky Way Galaxy. Human beings cannot comprehend how large our galaxy is. But as large as it is, the Milky Way Galaxy encompasses just a tiny fraction of the Universe. Wow!
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