Hubble Finds a New Planet Born After Its Star Died

Topic: Space

Astronomers using Hubble Space Telescope data found evidence of a new planet born after its star died. The planet is different from our own Earth and other planets in our solar system, which formed alongside their stars.

A team of astronomers has made an exciting discovery using the Hubble Space Telescope. They looked at old observations from 1999 and found something unusual. The white dwarf HS 0209+0832 had a high amount of niobium, a chemical element not seen before in this type of star.

Niobium is present on Earth and is used in jewelry and medical imaging devices. But the large amount detected in the HS 0209+0832 system suggests it came from material expelled during the star's death. This means that instead of forming alongside its star, like our own planets did, this new planet formed later from leftover material.

The researchers checked their findings against data from other NASA missions and found more evidence supporting their discovery. They used data from the FUSE mission to confirm the presence of niobium in the system. The TESS mission also provided important information by detecting repeating changes in brightness, which indicate that a planet is orbiting about 3.7 million miles from the star.

The team estimates that the new planet is a gas giant roughly the size of Jupiter and appears to be losing its atmosphere rapidly.

Why It Matters

This discovery could change our understanding of how planets form and what happens after stars die. It shows that there may be more to the story of star formation than we thought, with new characters showing up later in the process.

Key Facts

• A team of astronomers used Hubble Space Telescope data to find evidence of a new planet born after its star died.
• The planet is different from our own Earth and other planets in our solar system, which formed alongside their stars.
• The white dwarf HS 0209+0832 had a high amount of niobium, a chemical element not seen before in this type of star.
• Niobium is present on Earth and is used in jewelry and medical imaging devices.
• The new planet is estimated to be a gas giant roughly the size of Jupiter.

Key Terms

White dwarf

A star that has exhausted its fuel and shed its outer layers, leaving behind a hot core.

Niobium

A chemical element used in jewelry and medical imaging devices, which can be formed only in the conditions found inside dying stars.

Second-generation planet

A planet that forms later from leftover material expelled by a dying star, rather than forming alongside its star like our own planets did.

Implications

This discovery could change our understanding of how planets form and what happens after stars die. It shows that there may be more to the story of star formation than we thought, with new characters showing up later in the process.