All aboard the Spaceship Neptune: Flying to the fringe of dwelling on a balloon

All aboard the Spaceship Neptune: Flying to the fringe of dwelling on a balloon

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An illustration of the Spaceship Neptune flying over Earth.
(Image credit score: Residence Standpoint )

Factor in touring excessive sufficient to grasp a study the curvature of the Earth against the blackness of dwelling, no longer in a rapid, excessive-adrenaline rocket trip however a luxurious and unhurried balloon flight up into the stratosphere. 

That is the abilities a company known as Residence Standpoint is hoping to supply aspiring dwelling tourists with their Spaceship Neptune balloon at this time beneath trend.

Residence Standpoint hopes to initiating out up commercial flights in 2024, with paying passengers expected to pay about $125,000 apiece for the opportunity. The corporate has already started accepting seat reservations. 

Linked: Residence Standpoint unveils lavish interior of balloon-borne tourist pill

Can a balloon slither to dwelling?

Despite its title, Spaceship Neptune might well also no longer in truth reach dwelling, which officially begins at the Karman line, 62 miles (100 kilometers) above the Earth’s surface.

When a balloon is stuffed with a low-density gasoline comparable to hydrogen or helium, its resulting buoyancy causes it to face up by the atmosphere, since the balloon is lighter than the amount of air it displaces.

Because it rises greater and better, the surrounding air gets thinner and thinner, and in the slay, the balloon is confronted by Archimedes’ Precept, which halts the ascent when the ambient density is the equivalent as its obtain. For a balloon like Spaceship Neptune, this might occasionally per chance well happen around an altitude of 20 miles (30km).

A large silver balloon inflating to lift to the Spaceship Neptune

The first take a look at flight of the Spaceship Neptune balloon took self-discipline in June 2021. (Image credit score: Residence Standpoint )

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Thankfully, from the point of search of the passengers carried by the balloon, that is appropriate a technicality. 

Even from an altitude of 20 miles (30km), they’ll be in a situation to grasp a study the blackness of dwelling above them and the spherical Earth below them, in a search no longer too numerous from that at the Karman line. And due to Archimedes’ belief, once they reach their peak altitude they’ll appropriate waft there, comparatively than falling merit to Earth like a suborbital rocket. 

This permits a grand longer abilities, with Residence Standpoint proposing 6-hour missions: 2 hours ascending by the stratosphere, 2 hours floating at most altitude and two hours descending to a soft splashdown in the ocean. 

The corporate made a a success uncrewed take a look at flight from NASA’s Kennedy Residence Heart in Florida in 2021.

Aboard the Spaceship Neptune

Although Spaceship Neptune might well also no longer reach the Karman Line, this might occasionally per chance well slither above one other key boundary known as the Armstrong Line. Located around 12 miles (19km) altitude, the air stress here is so low that water boils at customary body temperature. 

In recount to continue to exist, this implies other folks want both a spacesuit or a pressurized cabin. Thankfully for Residence Standpoint’s prospects, Spaceship Neptune will more than doubtless be geared up with the latter, in the manufacture of a advise-of-the-artwork pill suspended beneath the balloon. Then over again it is not in truth the kind of minute, utilitarian pill most frequently linked to dwelling slither back and forth. Or no longer it is each substantial and opulent, giving the occupants 360-stage panoramic views. 

Two people looking through the windows of Spaceship Neptune and seeing the Earth below

Travellers on Spaceship Neptune will abilities gorgeous views of Earth and residential. (Image credit score: Residence Standpoint)

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The interior will more than doubtless be maintained at a cheerful temperature the employ of a thermal aid an eye on machine and reflective coatings on the outside surfaces to decrease photograph voltaic heating. For even greater passenger comfort, the cabin will embody reclining seats and couches, temper lighting and even food and beverage companies and products.

Extra files

For more details about Residence Standpoint and Spaceship Neptune search recommendation from the businesses’ web operate (opens in original tab)


  • FAI Astronautic Records Rate, “100km altitude boundary for astronautics (opens in original tab)“, accessed October 2022.  
  • John H. Lienhard, “The perimeter of dwelling (opens in original tab)“, Engines of Our Ingenuity, accessed October 2022. 
  • Amy Frearson, “Residence Standpoint develops “grand more thrilling” carry out for dwelling-slither back and forth pill (opens in original tab)“, de zeen, August 2022. 
  • U.S. Centennial of Flight Rate, “Lighter-Than-Air – An Overview (opens in original tab)“, accessed October 2022. 
  • NASA, “Kinds of Balloons (opens in original tab)“, accessed October 2022. 
  • Maureen O’Hare, “On sale: $125,000 balloon trips to the fringe of dwelling (opens in original tab)“, CNN, June 2021

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Andrew May presumably well additionally merely holds a Ph.D. in astrophysics from Manchester College, U.K. For 30 years, he labored in the academic, authorities and non-public sectors, sooner than turning steady into a science author where he has written for Fortean Events, How It Works, All About Residence, BBC Science Focal point, amongst others. He has also written a range of books at the side of Cosmic Affect and Astrobiology: The Come at some stage in for Existence In numerous places in the Universe, published by Icon Books.