earth – Katie L. Carroll

I was very excited to discover that SELFIES FROM MARS: THE TRUE STORY OF MARS ROVER OPPORTUNITY earned an orange banner for being a #1 new release in children’s aeronautics & space books!

I have several other works-in-progress about space robots, including a fictional story about the real Mars rover Perseverance (and Mars helicopter Ingenuity) and a nonfiction one about the Voyager space probes. And it got me wondering, What it is about space robots that has sparked my imagination?

Considering the size of the universe, and even of the solar system, human space travel is–to put it mildly–very limited. The farthest we’ve been is the moon, on average 238,855 miles from Earth. That’s about the size of 30 Earths, and can be considered really far away in terms of Earthly travel.

How about Mars? Humans haven’t been there yet, but we’ve sent a bunch of robots there, and we might even get there soon. The answer here varies because of the constant rotation of the planets around the sun, but on average, Mars is 140 million miles away from Earth and it get as close as 35 million miles. A lot farther than the moon!

Looking at the solar system, it doesn’t really make sense to talk about it in millions of miles because it’s so large. So scientists use the Astronomical Unit (AU) to describe distances of that size. One AU is 93 million miles, which is the average distance between the sun and the Earth. Neptune is 30 AU from the sun, or 2.8 billion miles. The Kuiper Belt, where Pluto resides, isn’t even the end of the solar system, and that can be as far as 50 AU from the sun.

Depending on how you define the end of the solar system (and there isn’t necessarily consensus on this in the scientific community), our solar system can be measured from 122 AU (at the heliopause, the place where solar winds meet interstellar winds) all the way to 100,000 AU from the sun (at the Oort Cloud, the farthest reach of the sun’s gravitational influence).

So really, really large. And that’s just the solar system, never mind the mind-bending that is required to think about how big the universe is! Still with me?

That brings us back to, What does the size of the solar system have to do with my interest in space robots? Space robots can travel much, much farther than humans can.

Mars currently has two working rovers on it, Curiosity and Perseverance, and a helicopter named Ingenuity. The space probe Voyager 1 has been traveling through the solar system for more than 45 years. At 159 AU (approximately 14.8 billion miles from the sun), it is deeper out in space than any other human-made object, and has traveled beyond the heliopause. And there are numerous other space robots out exploring the sun, other planets, other moons, etc.

Space robots are our ambassadors to space! We can’t go there yet, so we send out these robots. Some of them even look a little like us, and they’re all robot scientists, communicating their findings back to Earth. We learn from them, but they also represent us.

Voyager 1 even contains a Golden Record with sights and sounds from Earth and mathematical instructions on how to listen to it. I love picturing aliens (or future humans) coming across Voyager 1 and listening to that record. What would they (or what would future humans) think of the humans that sent the record out into space?

Anyway, that definitely sparks my imagination. I think it’s also important to learn about those space robots that are out there representing humans in space: our interstellar ambassadors!

I’m learning a lot about the earth through grounding myself, literally going out pretty much every day and putting my bare feet on the natural ground (for more about how and why I do this, check out my other grounding posts).

I’m getting a feel for the different seasons. The cool, wet soil of early spring, often still hard from the winter freeze. The gradual warming and thaw, the earth more forgiving as spring turns into summer. Then there’s the crunchy, dry heat of late summer grass under my feet, lingering into fall. Eventually autumn ushers in a brief reawakening of the earth. The grass turns green and springy, the warm soil forms to my feet. Then the leaves fall and the earth is crunchy on the surface. Finally winter brings the snow and ice, often I have to dig under the snow to find a small patch of hard, cold earth.

The earth is strangely similar feeling in winter and summer, not in temperature (obviously!), but there’s a hardness to both seasons. The freeze brings the hardness to winter, and the dryness brings it to summer.

I’m also getting a feel for the time of day. I like to go out at different times during the seasons (though you won’t catch me grounding myself at night in the winter…I’m not that crazy!). Mornings are often wet with dew. There’s a quietness to the earth as it wakes. Midday groundings are usually quick, a quiet moment for me to let the tingles in my feet awaken and to take a few deep breaths before I get back to the business of the day. I don’t always have time to stop and think for too long about what I’m feeling.

I think I like twilight groundings the best, though it’s probably the time of day when I least often go out (it tends to be the busiest time of day with the family). I’ve always enjoyed the energy of twilight. The last burst of activity from the day animals, the night creatures starting to peek out of their daytime slumber. The sky is stuck between night and day, a lightness lingering in the east and the stars begin to shimmer. The earth is buzzing with all that has happened during the day but not ready to settle into night.

The quiet moment or two I take to ground myself not only connects me to the earth, it connects me to myself. I don’t need to think, I only need to remember to breathe as my feet touch the ground. I wait until the tingling starts, give it a minute to soak in. The longer it has been since my last grounding, the longer it takes to get that feeling but the greater the impact. Sometimes it’s good to skip a few days to regain the newness of grounding. But I never wait too long to get back out there and connect.