01
Start with what is real
Open space tools and plain writing that anyone can use today, like the orbit calculator below, built on published physics.
A space company, from day one
Beyond the
known universe.
Celestheon is a new company with one obsession: space, in every branch of it. Today it is a founder, a mission and open tools anyone can use. We are looking for the people who want to build the rest.
No launches, hardware or customers yet. We say so plainly, and a person answers every message.
How it works
Every branch of space, started honestly.
02
Find the people
Engineers, scientists, writers and builders who want to work on space. Celestheon grows by the people it brings together.
03
Take on every branch
Launch, satellites, research, materials, education. The aim is all of it, one honest step at a time, announced only when it is true.
Free tool
How fast is an orbit?
Enter an altitude above Earth and get the speed, the time for one lap and the escape speed, from Newton's laws. Nothing is sent anywhere.
Work with us
Build space
with us.
Tell us who you are and what you would like to work on. Partners, builders, scientists and writers are all welcome.
Lucky reads every message and replies by email.
Prefer email? Write to Lucky ↗Fields marked * are required.
We use what you send only to reply to you. See our privacy policy.
Pricing
Ways to work with Celestheon.
Celestheon is at its very start, so there is nothing to buy yet. These are the three ways to be part of it, and every one begins with an email from a person.
Partner
Talk to us
You run a lab, a school, a maker space or a space company and want to share data, research or a project. Tell us what you have in mind.
Join
Talk to us
You want to work on space with us: engineering, science, writing, design or software. Send what you have done and what you want to build.
Invest
Talk to us
You want to follow Celestheon from the beginning and hear when there is something to invest in. We send plain updates, never a pitch you did not ask for.
Celestheon has no launches, hardware, contracts or customers yet, and says so. Nothing is ever charged through this site.
Investors
Follow it
from day one.
There is nothing to invest in yet. Leave your details and we send a plain update when there is something real to share.
No pitch decks you did not ask for.
Prefer email? Write to Lucky ↗Fields marked * are required.
We use what you send only to reply to you. See our privacy policy.
Before you send
Questions people ask
Is Celestheon launching rockets?
Not yet. Celestheon is at its start: a founder, a mission and open tools. When it builds or launches anything, this page will say so, and not before.
Who is behind it?
Lucky Ranasinghe, who builds AI-assisted products at MADITECH and has wanted to work in space his whole life.
How do I pronounce it?
Seh-LESS-thee-on. It joins celestial and pantheon.
Can I really join?
Yes. Send what you have done and what you want to build. Every message is read and answered by a person.