×
GreekEnglish

×
  • Politics
  • Diaspora
  • World
  • Lifestyle
  • Travel
  • Culture
  • Sports
  • Cooking
Sunday
18
Jan 2026
weather symbol
Athens 7°C
  • Home
  • Politics
  • Economy
  • World
  • Diaspora
  • Lifestyle
  • Travel
  • Culture
  • Sports
  • Mediterranean Cooking
  • Weather
Contact follow Protothema:
Powered by Cloudevo
> World

Mysterious Earth-sized planet could be hiding in plain sight in our Solar System

If such a planet exists, researchers say it would have a mass about 1.5 to...3 times that of Earth!

Newsroom September 6 11:17

Astronomers have found likely evidence of an Earth-like planet in the Solar System that may be circling the Sun in an orbit beyond Neptune.

Physicists, including those from the National Astronomical Observatory of Japan, said the planet could be much closer than the hypothetical Planet Nine thought to exist in the far outer edges of the Solar System.

Several studies in the past have suggested there is likely a yet-undiscovered planet beyond the Kuiper Belt – a stellar disk of materials such as asteroids, space rocks, comets around the Sun in the outer Solar System past the orbit of Neptune.

See Also:

>Related articles

Trump threatens tariffs against those who oppose U.S. plans for Greenland

CIA chief in Venezuela meets with Rodriguez

Ballistic missile strike hits pier in Ukraine

Cracking the code to discover ancient Tarot symbolism & forgotten universal knowledge

In the new research, published recently in The Astronomical Journal, scientists found that some of the objects in the Kuiper Belt behave in a way indicative of the presence of a small planet among them.

Continue here: The Independent

Ask me anything

Explore related questions

#earth#mysterious#Nibiru#planet#science#solar system#space#universe#world
> More World

Follow en.protothema.gr on Google News and be the first to know all the news

See all the latest News from Greece and the World, the moment they happen, at en.protothema.gr

> Latest Stories

War, diplomacy, or insurrection: What’s next in Iran

January 17, 2026

New tensions in the Middle East as Trump invites regional leaders to the Gaza Peace Council

January 17, 2026

Weather: A return to winter in the coming days – Cold and strong northerly winds – Kolydas’ post

January 17, 2026

A view of Nikolaos Stasinopoulos of Viohalco – The “enduring imprint” of Greece’s greatest industrialist

January 17, 2026

The horror of the “Tariff of the Dead”: how the Iranian regime prices the bodies of protesters

January 17, 2026

Mitsotakis on the Karystianou party: “There is a long distance between being the parent of a tragedy victim and being the leader of a political party”

January 17, 2026

Patras in carnival mode – This evening, the city’s official opening ceremony

January 17, 2026

Greenland as the first line ofdefense for the U.S. and NATO:

January 17, 2026
All News

> World

War, diplomacy, or insurrection: What’s next in Iran

The Iranian regime faces the most serious threat to its survival, despite the repression of protests - The possibility of a US strike remains on the table - The landscape for the next day is blurred

January 17, 2026

New tensions in the Middle East as Trump invites regional leaders to the Gaza Peace Council

January 17, 2026

The horror of the “Tariff of the Dead”: how the Iranian regime prices the bodies of protesters

January 17, 2026

Greenland as the first line ofdefense for the U.S. and NATO:

January 17, 2026

Changes at top universities: Oxford abolishes the term ‘doctores’ for inclusion reasons

January 17, 2026
Homepage
PERSONAL DATA PROTECTION POLICY COOKIES POLICY TERM OF USE
Powered by Cloudevo
Copyright © 2026 Πρώτο Θέμα