---
title: "Astronomers Record the Transit of the Youngest Exoplanet in History: TIDYE-1b Is 'Younger' Than Earth on a Scaled Timeline"
description: "Astronomers have recorded the transit of the youngest exoplanet, TIDYE-1b, whose conditional age is comparable to two weeks. The discovery was made possible by the rare geometry of the dust disk and data from the TESS telescope."
date: 2026-09-01T16:18:01.000Z
lang: en
url: https://xab.info/en/posts/youngest-exoplanet-tidye-1b-transit-recorded
tags: [exoplanet, astronomy, nasa-tess, protoplanet, transit-method]
publisher: "XAB.info"
---

# Astronomers Record the Transit of the Youngest Exoplanet in History: TIDYE-1b Is 'Younger' Than Earth on a Scaled Timeline

![Artist's illustration of the transit of exoplanet TIDYE-1b across a young orange star: a banded planet with a thin atmospheric rim crosses the glowing stellar disk against a starry space](https://xab.info/media/2026/09/01/otkryta-samaya-molodaya-ekzoplaneta-tidye-1b/otkryta-samaya-molodaya-ekzoplaneta-tidye-1b-1.webp)

## 🎯 Key Points

- TIDYE-1b (IRAS 04125+2902b) is the youngest exoplanet detected by the transit method; on a scaled timeline its age is comparable to two weeks when Earth is 50 years old.
- The observation was made possible by a rare geometry: an emptied inner disk, a tilted outer disk, and an 'edge-on' transit, caught by TESS with a period of 8.83 days and confirmed by the Notch AI algorithm.
- The planet's radius is about 10.7 Earth radii with a mass of less than 30% of Jupiter's mass; its puffed-up hydrogen atmosphere will disperse over time, and the object will shrink to a sub-Neptune or super-Earth.
- The cause of the sharp orbital tilt relative to the disk remains unknown: the influence of a neighboring star, internal migration, or an influx of gas from nearby clouds.

Astronomers have announced the observation of the transit of an exoplanet that, by age, is the youngest ever recorded by this method. The object has been given a dual official designation — IRAS 04125+2902b and TIDYE-1b. For clarity, the researchers offer a scaled analogy: if Earth were 50 years old, the newly discovered planet would be just two weeks old. The planet orbits a protostar in a so-called stellar nursery, where newborn planets are typically hidden by dense clouds of dust and gas for roughly 10 million years and remain invisible to direct observation.

### Rare Geometry and the Role of the TESS Telescope

Seeing such a young object was made possible by a rare alignment of several geometric conditions. First, the inner part of the star's dust disk has already emptied, while the outer disk is tilted almost flat relative to Earth, reducing the optical 'veil'. Second, the orbit of TIDYE-1b passes 'edge-on' relative to an observer on Earth, so the planet is clearly projected against the star's disk during the transit. NASA's TESS space telescope detected periodic brightness variations at an interval of about 8.83 days, and to confirm the weak signal against the turbulent data of the young star, the scientists applied a specialized AI algorithm called Notch, which isolated the characteristic transits.

### A Puffed-Up Gas Giant on Its Way to Contraction

In size, TIDYE-1b nearly reaches the dimensions of Jupiter: its radius is estimated at about 10.7 Earth radii. At the same time, the object's mass is less than 30 percent of Jupiter's mass, indicating a puffed-up hydrogen atmosphere that has not yet had time to contract and cool. Scientists predict that over the next few hundred million years most of this envelope will disperse, and the planet will shrink to the size of a sub-Neptune or super-Earth, thus passing through the classic stage of early evolution of a gas giant.

### The Mystery of the Tilted Orbit

The main unresolved intrigue of the discovery remains the sharp angle of the planet's orbital tilt relative to the plane of the surrounding protoplanetary disk. Among the possible causes, astrophysicists consider the gravitational influence of a neighboring star, internal migration of the planet within the system, or an influx of gas from nearby cosmic clouds. Solving this mystery will help refine models of planet formation and early dynamics in stellar nurseries.

### Contradictory Data

In the provided materials, no significant discrepancies between sources on the key figures (radius of about 10.7 Earth radii, mass less than 30% of Jupiter's mass, transit period of 8.83 days) have been recorded. The only point requiring clarification for the reader is the phrase 'two weeks': this is a conditional scaled analogy comparing the relative age of the planet with the age of Earth, not an absolute chronological period in years. The absolute age of the object is not given in the original reports, so it is intentionally not stated in the article in order to avoid inaccuracies.

## 🔍 Fact-Check Verification

- [Astronomers Discover a Planet That Is Only Two Weeks Old: How Is This Possible](https://www.rbc.ua/ukr/news/astronomi-vidkrili-planetu-kiy-lishe-dva-1788270192.html) - Подтверждает обозначения, аналогию возраста, роль TESS и период транзита.
- [Scientists Find a Baby Planet Whose Age Is Equivalent to Two Weeks](https://charter97.org/ru/news/2024/11/29/620779/) - Согласуется с общей картиной открытия и параметрами объекта.
- [Scientists Find a Baby Planet Whose Age Is Equivalent to Two Weeks](https://www.rbc.ru/life/news/67499f2d9a7947eea5b94595) - Подтверждает размеры, массу и прогноз эволюции атмосферы.
- [The Transit Method Detects the Youngest Exoplanet in the History of Astronomy](https://www.ixbt.com/news/2024/11/24/tranzitnyj-metod-obnaruzhil-samuju-moloduju-jekzoplanetu-v-istorii-astronomii.html) - Подтверждает статус рекорда по возрасту и метод транзита.

## ❓ FAQ

### Q: Why was the planet called a 'baby' and how old is it?
**A:** 'Two weeks' is a conditional scaled analogy: if Earth were 50 years old, TIDYE-1b would correspond to two weeks. The absolute age in years is not given in the reports, so it is not stated in the article.

### Q: How was it possible to see a planet usually hidden by dust?
**A:** Thanks to a rare geometry: the inner dust disk has emptied, the outer disk is tilted flat relative to Earth, and the planet's orbit passes 'edge-on', producing a clear transit caught by TESS and confirmed by the Notch AI algorithm.

### Q: What are the size and future of TIDYE-1b?
**A:** Its radius is about 10.7 Earth radii with a mass of less than 30% of Jupiter's mass. The puffed-up hydrogen atmosphere will disperse over time, and the planet will shrink to a sub-Neptune or super-Earth.