Celestvox
Ideas, stories and discoveries in one place.
What If the Sun Vanished Right Now? Earth Would Have Eight Minutes of Light
If the Sun vanished right now, the sky would not change immediately. For a little more than eight minutes, Earth would keep receiving the last sunlight — and continue or…
An Asteroid Is Heading for Earth: Could We Make It Miss?
If an asteroid were discovered on a collision course with Earth, the first image that came to mind might be a spectacular explosion. The smarter solution could be much q…
How Long Would You Survive on Venus?
Venus looks close to Earth, but its surface is one of the most hostile environments in the Solar System. If a person reached the ground without extraordinary protection,…
Nancy Grace Roman: The Telescope That Could See 100 Times More Sky Than Hubble
The Nancy Grace Roman Space Telescope was built to look at the universe in wide angle. With a primary mirror the same size as Hubble’s, it could capture at least one hun…
The Moon Will Enter Earth’s Shadow — Why Could It Turn Red?
The Moon does not disappear during a partial lunar eclipse. Between August 27 and 28, 2026, Earth’s shadow will move across almost the entire lunar disk — and sunlight p…
Would you survive falling into a black hole?
The answer does not begin with an explosion. For an observer crossing the event horizon, the fall could begin in a strangely calm way — before gravity turns the journey …