Aside from a few forays to France, the furthest my maternal grandparents travelled was Pembrokeshire, Wales (repeat visits to a wind-buffeted static caravan in Croes-goch, if you must know). Just a generation later, my parents’ peregrinations had encompassed most of Western Europe.

As of writing, I’ve visited about 50 countries (I counted them up once, but have forgotten the total), most of them during two spells of backpacking – first across the US, then around the world – plus others as and when the opportunity arose.

My wife has been to twice that number of destinations, and I’d wager that a significant proportion of the people who comprise Lonely Planet’s extended community – staff and contributors, followers and fans – have led equally footloose lives.

The trend continues, too: my son, four, and daughter, one, have already visited many more places than my grandparents did in their entire lives. In fact, Harvey probably covered more miles in utero than they managed in total.

Our expanding horizons

You can visualise each generation’s expanding horizons as a series of concentric circles, like ripples spreading out from a stone dropped in a pond; assuming that trend doesn’t go into reverse (which is possible, of course, given variables like climate change), where will the edge of my children’s known universe lie? Just as I have explored the far side of this planet, might they explore the far side of another world?

It’s not as far-fetched as it sounds. As it often does, the stuff of science fiction has become the stuff of science fact: the race for space is more competitive now than it has been at any time since Neil Armstrong took that famous first step on the surface of the Moon, an epoch-defining moment that happened 50 years ago this July.

Neil Armstrong set foot on the Moon 50 years ago; what’s the next ‘giant leap for mankind’? © Caspar Benson / Getty Images

From moonshots to Mars

The US government recently vowed to revisit our lonesome natural satellite within five years, but the real action is arguably elsewhere as a trio of companies bankrolled by billionaires – Richard Branson’s Virgin Galactic, Jeff Bezos’ Blue Origin and Elon Musk’s SpaceX – compete to conquer the final frontier.

The obstacles are formidable; the progress is remarkable. Whether or not we witness commercial space travel take off in 2019 (in both senses of the phrase), the expert analysis of Stanford University’s Professor G. Scott Hubbard – a former director of NASA’s Ames Research Center – suggests that we stand on the threshold of a new era.

After the moonshot, the US wants to send astronauts to Mars. And then? Because we won’t stop there. Michael Collins, who piloted the Apollo 11 Command Module around the Moon as Armstrong and Buzz Aldrin bounded across its sterile surface, expressed this ever so well: ‘It’s human nature to stretch, to go, to see, to understand,’ he said. ‘Exploration is not a choice, really; it’s an imperative.’

Or as another Buzz might say: to infinity and beyond.

The Grand Tour redux

So will my children ever enjoy a Grand Tour of the Solar System, as envisaged in NASA’s charming Visions of the Future posters? (Do check them out.) Will they stand in the shadow of Mars’ Olympus Mons, which rears to more than twice the height of Everest? Will they gape at the raging auroras of Jupiter, hundreds of times more powerful than our own Northern Lights? Will they sail the methane lakes of Titan, Saturn’s most enigmatic moon?

Alas, no. If it comes to pass, such a journey would be the preserve of a privileged few for many generations; just as the original Grand Tour of Europe was restricted to the aristocracy, so a round-trip of our galactic neighbours would remain beyond the reach of all but a coterie of plutocrats for the foreseeable future.

There’s a fair chance, however, that my children’s generation will see the curvature of the Earth from a sub-orbital flight, and some of them might, just might, leave a footprint on the Moon (thanks to Wallace and Gromit, Harvey already spends a lot of time speculating about this possibility).

Will our children’s children evolve into a spacefaring species? © James Whitaker / Getty Images

A mote of dust

In his exquisite book Pale Blue Dot, Carl Sagan predicts we will eventually evolve into a spacefaring species, exploring the Milky Way in much the same way as we once sailed this planet’s uncharted seas. But there is nothing triumphalist about his vision; in fact, that dot – the Earth photographed from the Voyager 1 spacecraft; ‘a mote of dust suspended in a sunbeam’ as Sagan describes it – proves to be a profoundly humbling sight.

It’s a stance shared by the UK’s current Astronomer Royal, Martin Rees, who argues that we should avoid the term ‘space tourism’ altogether. According to Rees, that formula of words gives us an excuse to ignore the perilous predicament of our planet, misleadingly implying that we could start again elsewhere once this world has been utterly exploited and exhausted.

Space excites me; perhaps it excites you, too. I think that’s because, from Star Trek to Star Wars, our culture often depicts it in a way that fits neatly into a traveller’s conceptual model: it’s the realm of the new exotic, the absolute last word when it comes to getting off the beaten track we call… home.

You can no more suppress our species’ longing to reach the stars than prevent a curious child from exploring the boundaries of its world. Sooner or later, we will boldly go – and not just astronauts or the ultra-rich, but ordinary people like me and you. But when we do, amid all the excitement, let’s not forget our point of origin.

In the words of Sagan from 25 years ago, let’s remember that: ‘Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves … Like it or not, for the moment the Earth is where we make our stand.’

A lonely planet indeed.

In this guest post, Stanford University’s Professor G. Scott Hubbard – former Director of NASA’s Ames Research Center, founding editor-in-chief of the New Space journal, and author of Exploring Mars: Chronicles from a Decade of Discovery – looks at whether the travel industry is heading for the final frontier.

Having been active in the US space program for 45 years, both with NASA and now Stanford, I’ve seen many proposals suggesting that personal space travel is right around the corner. While this topic has been discussed in science fiction for more than 60 years, making such an experience a reality has been hampered by significant obstacles, both technical and financial. However, during the last decade or two, the world has seen the emergence of wealthy space entrepreneurs who have hired top-notch engineers. Those teams may well now be on the verge of creating space travel for the (well-heeled) extreme adventurer.

Where is outer space?

The usual definition is that space begins at 100 kilometres/60 miles above the surface of the Earth where air is almost non-existent, and the clutch of gravity can be escaped. As a practical matter, NASA awards astronaut wings for any pilot that exceeds 50 miles even if he/she does not orbit Earth. (This is called a sub-orbital flight). For comparison, the US Space Shuttle flew at about 300 kilometres/188 miles); the International Space Station (ISS) orbits Earth at 250 miles; from the Earth to the Moon averages about 238,000 miles, and Mars is nearly 140 million miles away! All of these distances and destinations represent some form of space travel, but as you might imagine, the degree of difficulty increases radically the further one goes. As of this writing, over 500 people have been to space as defined above; the vast majority (355) on the Shuttle. But only 18 people have flown to the Moon. And of those, only 12 have walked on the lunar surface. No human has ever travelled to Mars.

What is a space tourist?

All of the people cited above had extensive training and were a member of some nation’s space program. Currently, only the US, Russia and China have the independent ability to launch someone into space. The notion of a private citizen with little or no special training going to space went from science fiction to fact with the trip by billionaire Dennis Tito to the ISS in 2001, aboard a Russian vehicle. A total of seven people have made this journey for a reported cost of USD$20m to $40m per trip. Clearly, this expense is out of the reach of all but the ultra-wealthy. So what about some less ambitious (and less expensive) trip to space – the travel to 50 to 60 miles in a so-called sub-orbital trajectory?

Virgin Galactic’s SpaceShipTwo takes off for a suborbital test flight © GENE BLEVINS / Getty Images

Who’s in the game?

Space tourism as a trip to the edge of space (50 to 60 miles) with immediate return received a major boost with the Ansari X-Prize, which awarded $10m to any non-government group that could ‘build and launch a spacecraft capable of carrying three people to 100 kilometres above the Earth’s surface, twice within two weeks’. The prize was won in 2004 by a team funded by billionaire Paul Allen (the co-founder of Microsoft) using a design by the iconoclastic engineer Burt Rutan. The team was joined by another billionaire – Richard Branson of Virgin Group fame. Shortly after winning, Branson announced that a new company, Virgin Galactic, using the Rutan design, would soon begin offering sub-orbital flights for six people (and two pilots), providing four minutes of weightlessness. Another company, XCOR Aerospace, formed during the same period, began to develop a smaller vehicle that would carry one pilot and passenger. Finally, the world’s richest person, Jeff Bezos founder of Amazon, quietly created the company Blue Origin with similar goals in 2000. In the sparse public reports from Blue Origin, their first market is sub-orbital tourism, followed by orbital flight and trips to the Moon. Bezos has said he is spending about $1bn a year on Blue Origin.

What’s the price point?

Virgin Galactic has given a price of about $200,000 per person. XCOR Aerospace (which has since suspended operations) planned to provide a similar flight for reportedly $50,000. (Independent surveys have indicated that extreme adventure with a price tag of $50,000 would begin to attract a great deal of interest.) Blue Origin’s price tag is said to be $250,000. It is worth noting that the other high-profile space entrepreneur, Elon Musk and his company SpaceX, has not entered the sub-orbital business. However, in a public speech in 2016 (which you can read in New Space for free), Musk predicted he would be able to send individuals to Mars for about $140,000.

People watch as a SpaceX rocket takes off from Canaveral National Seashore © Paul Hennessy / Getty Images

What are the risks?

Travel to space is inherently risky, but then so is climbing Mt Everest. During the 135 flights of the Shuttle program, there were two major accidents with loss of crew and vehicle: Challenger in 1986 and Columbia in 2003. By that measure, the chance of dying in a trip to orbit is around 1 ½%. One would assume that a sub-orbital flight would be safer, but the initial flights of Branson’s Virgin Galactic SpaceShipTwo have already produced one test pilot fatality. High-speed rocketry with propulsion of controlled chemical explosions is still a challenge. In addition, there are the biomedical risks of subjecting a ‘normal’ population to some of the rigours of space travel: high accelerations up to eight times Earth’s gravity, weightlessness where some experience debilitating space sickness and greater than average radiation exposure. Fortunately, experiments by Dr James Vanderploeg from the University of Texas indicate that individuals of ages 18 to 85 with a variety of common issues (artificial joints, controlled hypertension, pacemaker implants, etc) can easily withstand simulated trips using ground centrifuges and parabolic aeroplane flights. This can also be read in New Space.

When will this happen?

The sub-orbital space tourism community has collectively been surprised that it is now almost 15 years since the X-Prize was won, yet there are no regular flights of SpaceShipTwo or the New Shephard of Blue Origin. The answer mostly lies in the realm of technical issues; in a way, it is ‘rocket science’. Virgin Galactic has struggled to find a propulsion system that will operate smoothly to propel the six passengers to at least 50 miles. However, a very recent successful test in February of 2019 gives an indication that Virgin Galactic may be almost ready. Blue Origin has been very secretive about their progress, but it appears from test flights that the New Shephard is also nearing operational status.

Barring another accident, I think 2019 will see the first tourist flights to the edge of space and back. All it will take is $200,000 and the willingness to sign an ‘informed consent’ document!

To find out more about space entrepreneurship and innovation, check out the New Space journal. Professor Hubbard’s book, Exploring Mars: Chronicles from a Decade of Discovery, is available from the University of Arizona Press, as well as Amazon and Barnes & Noble.