A rocky planet roughly the size of Earth has been found still orbiting a white dwarf, the faded remnant of a dead star. The discovery suggests that rocky worlds do not always end up destroyed when their parent stars die.
The system lies near the center of the Milky Way, and the planet was identified through microlensing, a method that detects the way gravity bends and magnifies light from a distant background star. That technique allowed astronomers to spot the rocky body at an orbit considered safe around the white dwarf.
What the discovery means for Earth
For years, the common picture of Earth’s far future has been bleak. In about 5 billion years, the Sun is expected to run out of hydrogen fuel and expand into a red giant.
In that phase, Mercury and Venus are expected to be swallowed first. Earth was also widely believed to be destroyed as the Sun swells and the surrounding environment becomes far too hot.
The new finding adds a different possibility. When a star enters its red giant phase and sheds its outer layers, it loses a large amount of mass, and its gravity weakens.
That weakening can push nearby planets into wider orbits. For Earth, that could mean a shift to a safer distance from the star’s expanded outer layers.
Survival is not the same as habitability
Even if Earth avoided being physically swallowed, it would not remain a familiar world. Once the Sun becomes a white dwarf, its light and heat would fade sharply, leaving Earth frozen into an icy planet.
Researchers behind the study said there is still no absolute consensus on whether Earth will truly escape being engulfed by a red giant. Still, the discovery shows that some rocky, Earth-like planets can survive after their host stars die.
| Key Fact | Detail |
|---|---|
| Planet type | Rocky planet about Earth-sized |
| Host star | White dwarf |
| System location | Near the center of the Milky Way |
| Detection method | Microlensing |
MediaIndonesia.com reported that the next step for astronomers is to find more systems like this across the galaxy. If more examples turn up, the final fate of rocky planets may prove far more varied than the simple idea of total destruction when a star dies.