WordGarden.iosuborbital
B1Pronunciation
UK
- /sˈʌbɔːbˌɪtəl/
US
Meanings
Adjective
describing a flight or trajectory that reaches space but does not enter orbit
Beyond the definition
Imagine throwing a ball really, really hard. It goes up, arcs over, and comes back down. That is essentially what a suborbital flight does! The prefix "sub-" means below, and "orbital" refers to the path an object takes to stay in space around a planet, like a satellite. So, suborbital describes a trajectory that reaches space but does not have enough speed to stay there. Instead, the object falls back to Earth.
Think of it as dipping your toes into space before coming back home. This idea has become more familiar with the rise of space tourism, where companies like Blue Origin and Virgin Galactic offer brief periods of weightlessness on these flights. You do not circle the globe, but you do get a few memorable minutes high above Earth.
"Suborbital" describes a trajectory that takes an object into space, often above the Kármán line, which is commonly set at 100 kilometers or 62 miles, but does not provide the horizontal velocity required to maintain a stable orbit. Think of it like launching an object on a very high, long arc: it rises into space, experiences weightlessness near the highest point of its flight, and then falls back to the surface because of gravity.
The term is common in rocketry and aerospace engineering. Suborbital flights are often used for scientific research, allowing agencies to test equipment in near-space conditions without the full complexity and cost of reaching orbit. Today, the term is also strongly linked with the space tourism industry, where passengers can see the curve of the Earth and enjoy a short period of microgravity.
Historically, suborbital trajectories were important in early space exploration, allowing scientists to test rocket designs before attempting orbital missions. For example, the V-2 rockets developed during World War II were among the first human-made objects to reach the edge of space on such paths. While a true orbit requires enough sideways speed to keep falling around the Earth, a suborbital flight relies on an initial boost followed by a return descent. If you hear about someone "going to space" for only a few minutes, they are likely taking a suborbital trip.
Examples
- 1
Space tourism
The company hopes to offer suborbital tourist flights in the next few years.
- 2
Capsule return
After a few minutes of weightlessness, the suborbital capsule came back down safely.
- 3
Orbital comparison
Unlike an orbital mission, a suborbital test flight does not go all the way around Earth.
See also
Similar
- non-orbital
Shades of meaning
Contrast
Used with (collocations)
- suborbital flight
- suborbital trajectory
- suborbital rocket
- suborbital spaceflight
Explore
- sounding rocket
- escape velocity
Forms and spellings
1 form open this card.
Main spelling
- suborbitaladjective