A Planet 1,000 Light-Years Away Just Vanished From View — And Scientists Think They Know Why
Astronomers have witnessed something extraordinary: A planet located roughly 1,000 light-years from Earth has seemingly disappeared right before their eyes.
But don't worry, the planet hasn't been destroyed or swallowed by a black hole. Scientists believe another, still-undetected planet is responsible for making it disappear from view.
Researchers led by UCLA have identified what they believe is the first known case of a “disappearing planet.” The massive gas giant, called TOI-2535 b, was regularly spotted passing in front of its host star for years. Then, seemingly out of nowhere, those appearances stopped.
The discovery, published in The Astrophysical Journal Letters, offers a fascinating look at how planets can dramatically affect each other's movements in distant solar systems.
A Planet That Suddenly Went Missing
TOI-2535 b is what's known as a “hot Jupiter,” meaning it's a Jupiter-sized gas giant that orbits extremely close to its star.
In fact, it completes one trip around its star every 8.25 days. For comparison, Mercury takes 88 days to orbit our sun.
Astronomers tracked the planet using NASA's Transiting Exoplanet Survey Satellite (TESS) between April 2019 and March 2026.
At first, everything appeared normal. Scientists could spot the planet whenever it passed in front of its star, briefly blocking some of the star's light.
But eventually, its timing started getting weird.
The planet began crossing in front of its star earlier or later than expected, with some appearances shifting by as much as six hours. The crossings also became shorter and fainter until they stopped showing up entirely in 2026.
As UCLA researcher Samuel Yee explained, the universe doesn't always operate like perfectly synchronized clockwork. When multiple planets share a solar system, their gravitational forces can throw each other's orbits off track.
So What Happened to the Planet?
Scientists believe an unseen neighboring planet is responsible.
According to the research team, the gravitational pull of this mystery planet is causing TOI-2535 b's orbit to wobble and gradually tilt.
Eventually, the planet's path shifted so much that it no longer passes directly between its star and Earth. That means telescopes can no longer spot it using the transit method.
Think of it like a solar eclipse. Eclipses only happen when the sun, Earth and moon line up just right. If the moon's orbit were perfectly aligned with Earth's orbit around the sun, we'd see a solar eclipse every month. But because the moon's orbit is tilted, those alignments are relatively rare.
The same basic idea is happening in this distant solar system, only on a much larger scale.
Researchers say this is the most extreme example they've seen of planets interacting strongly enough to make another planet's transits disappear while astronomers are actively watching.
When Will We See It Again?
Believe it or not, scientists predict TOI-2535 b could become visible again in approximately 30 to 50 years as its orbit continues to shift.
The mystery neighboring planet could potentially be detected even sooner.
The discovery may also help answer a long-standing question about how giant planets end up orbiting so close to their stars.
Astronomers have debated whether hot Jupiters are pushed inward through violent gravitational encounters or slowly migrate closer to their stars over time.
Because TOI-2535 b appears to have a nearby planetary companion, researchers believe it may have gradually spiraled inward rather than being violently flung toward its star.
That could reveal a relatively uncommon but important way that giant planets form and evolve.
The international research team was led by Yee and UCLA astrophysicist Erik Petigura, with additional observations from the WIYN 3.5-meter telescope at Kitt Peak National Observatory in Arizona.
So, the planet hasn't gone anywhere. It's just temporarily out of sight — and astronomers may have to wait several decades for its return.
