10th Planet Discovered | Science Mission Directorate

Posted by 2018 article


The Doctor and his companions Ben and Polly arrive in the TARDIS at the South Pole in the year 1986, near the Snowcap base. The base is supervising the mission of the Zeus IV spaceship, running a routine probe on the Earth 's atmosphere.

Unusual readings on the spaceship's instruments lead to the discovery of a new planet suddenly approaching Earth. The spaceship begins to experience power losses, and Snowcap personnel begin arrangements to abort its mission.

Back on the base, the Doctor reveals what he knows about the tenth planet : it is Mondas , Earth's former sister planet and its inhabitants will soon be visiting Earth. True to his prediction, three robotic creatures land outside, killing the guards and disguising themselves in the dead men's furs to gain access.


July 29, 2005: "It's definitely bigger than Pluto." So says Dr. Mike Brown of the California Institute of Technology who announced today the discovery of a new planet in the outer solar system.

The planet, which hasn't been officially named yet, was found by Brown and colleagues using the Samuel Oschin Telescope at Palomar Observatory near San Diego. It is currently about 97 times farther from the sun than Earth, or 97 Astronomical Units ( AU ). For comparison, Pluto is 40 AU from the sun.

This places the new planet more or less in the Kuiper Belt , a dark realm beyond Neptune where thousands of small icy bodies orbit the sun. The planet appears to be typical of Kuiper Belt objects--only much bigger. Its sheer size in relation to the nine known planets means that it can only be classified as a planet itself, Brown says.

These three discovery images, each taken 1.5 hours apart on the night of October 21st, 2003, show the slight motion of the large, distant object 2003 UB 313 in the sky. Courtesy M. Brown (Caltech), C. Trujillo (Gemini Observatory), and D. Rabinowitz (Yale University) After 75 years of speculation and false leads, it has finally happened. A team of astronomers using the 48-inch Samuel Oschin Telescope at Palomar Observatory and the 8-meter Gemini North telescope on Mauna Kea, Hawaii, has discovered the largest Kuiper Belt object (KBO) ever.

The object, designated 2003 UB 313 , is currently 97 astronomical units (Earth-Sun distances) away — more than twice Pluto's average distance from the Sun. This makes it the farthest object ever seen in the solar system. It is a scattered-disk object, meaning that at some point in its history, an encounter with some massive object moved it into its highly inclined (44°) orbit. It's currently glowing at magnitude 18.9 in the constellation Cetus. Its high inclination is the only reason it wasn't discovered years ago; no one was looking for planets so far from the plane of the solar system.

Discoverers Michael E. Brown (Caltech), Chad Trujillo (Gemini Observatory), and David Rabinowitz (Yale University) first imaged the object on October 21, 2003, but didn't see it move in the sky until they reimaged the same area 15 months later, on January 8, 2005. Working backward from there, the astronomers have found old images of 2003 UB 313 in much earlier surveys, allowing them to determine its orbit accurately. The object turns out to be currently near aphelion (its farthest from the Sun) in a very elliptical orbit. It ranges as close as 38 a.u. to the Sun in a 557-year orbit.

Doctor Who and the Tenth Planet was a novelisation based on the 1966 television serial The Tenth Planet .

The Sergeant blinked again. Three lights were moving towards him through the murk of the blizzard. Even as he looked, the lights changed into three tall, straight figures, clad in silver-armoured suits, advancing across the ice with a slow deliberate step. Horror-struck, the Sergeant reached for his gun, and a stream of bullets sprayed across the marching figures. BUT THEY CONTINUED MARCHING...

The CYBERMEN have arrived. The first invasion of Earth by this invincible, fearless race-and the last thrilling adventure of the first DOCTOR WHO .

The Doctor and his companions Ben and Polly arrive in the TARDIS at the South Pole in the year 1986, near the Snowcap base. The base is supervising the mission of the Zeus IV spaceship, running a routine probe on the Earth 's atmosphere.

Unusual readings on the spaceship's instruments lead to the discovery of a new planet suddenly approaching Earth. The spaceship begins to experience power losses, and Snowcap personnel begin arrangements to abort its mission.

Back on the base, the Doctor reveals what he knows about the tenth planet : it is Mondas , Earth's former sister planet and its inhabitants will soon be visiting Earth. True to his prediction, three robotic creatures land outside, killing the guards and disguising themselves in the dead men's furs to gain access.


July 29, 2005: "It's definitely bigger than Pluto." So says Dr. Mike Brown of the California Institute of Technology who announced today the discovery of a new planet in the outer solar system.

The planet, which hasn't been officially named yet, was found by Brown and colleagues using the Samuel Oschin Telescope at Palomar Observatory near San Diego. It is currently about 97 times farther from the sun than Earth, or 97 Astronomical Units ( AU ). For comparison, Pluto is 40 AU from the sun.

This places the new planet more or less in the Kuiper Belt , a dark realm beyond Neptune where thousands of small icy bodies orbit the sun. The planet appears to be typical of Kuiper Belt objects--only much bigger. Its sheer size in relation to the nine known planets means that it can only be classified as a planet itself, Brown says.

The Doctor and his companions Ben and Polly arrive in the TARDIS at the South Pole in the year 1986, near the Snowcap base. The base is supervising the mission of the Zeus IV spaceship, running a routine probe on the Earth 's atmosphere.

Unusual readings on the spaceship's instruments lead to the discovery of a new planet suddenly approaching Earth. The spaceship begins to experience power losses, and Snowcap personnel begin arrangements to abort its mission.

Back on the base, the Doctor reveals what he knows about the tenth planet : it is Mondas , Earth's former sister planet and its inhabitants will soon be visiting Earth. True to his prediction, three robotic creatures land outside, killing the guards and disguising themselves in the dead men's furs to gain access.

The Doctor and his companions Ben and Polly arrive in the TARDIS at the South Pole in the year 1986, near the Snowcap base. The base is supervising the mission of the Zeus IV spaceship, running a routine probe on the Earth 's atmosphere.

Unusual readings on the spaceship's instruments lead to the discovery of a new planet suddenly approaching Earth. The spaceship begins to experience power losses, and Snowcap personnel begin arrangements to abort its mission.

Back on the base, the Doctor reveals what he knows about the tenth planet : it is Mondas , Earth's former sister planet and its inhabitants will soon be visiting Earth. True to his prediction, three robotic creatures land outside, killing the guards and disguising themselves in the dead men's furs to gain access.


July 29, 2005: "It's definitely bigger than Pluto." So says Dr. Mike Brown of the California Institute of Technology who announced today the discovery of a new planet in the outer solar system.

The planet, which hasn't been officially named yet, was found by Brown and colleagues using the Samuel Oschin Telescope at Palomar Observatory near San Diego. It is currently about 97 times farther from the sun than Earth, or 97 Astronomical Units ( AU ). For comparison, Pluto is 40 AU from the sun.

This places the new planet more or less in the Kuiper Belt , a dark realm beyond Neptune where thousands of small icy bodies orbit the sun. The planet appears to be typical of Kuiper Belt objects--only much bigger. Its sheer size in relation to the nine known planets means that it can only be classified as a planet itself, Brown says.

These three discovery images, each taken 1.5 hours apart on the night of October 21st, 2003, show the slight motion of the large, distant object 2003 UB 313 in the sky. Courtesy M. Brown (Caltech), C. Trujillo (Gemini Observatory), and D. Rabinowitz (Yale University) After 75 years of speculation and false leads, it has finally happened. A team of astronomers using the 48-inch Samuel Oschin Telescope at Palomar Observatory and the 8-meter Gemini North telescope on Mauna Kea, Hawaii, has discovered the largest Kuiper Belt object (KBO) ever.

The object, designated 2003 UB 313 , is currently 97 astronomical units (Earth-Sun distances) away — more than twice Pluto's average distance from the Sun. This makes it the farthest object ever seen in the solar system. It is a scattered-disk object, meaning that at some point in its history, an encounter with some massive object moved it into its highly inclined (44°) orbit. It's currently glowing at magnitude 18.9 in the constellation Cetus. Its high inclination is the only reason it wasn't discovered years ago; no one was looking for planets so far from the plane of the solar system.

Discoverers Michael E. Brown (Caltech), Chad Trujillo (Gemini Observatory), and David Rabinowitz (Yale University) first imaged the object on October 21, 2003, but didn't see it move in the sky until they reimaged the same area 15 months later, on January 8, 2005. Working backward from there, the astronomers have found old images of 2003 UB 313 in much earlier surveys, allowing them to determine its orbit accurately. The object turns out to be currently near aphelion (its farthest from the Sun) in a very elliptical orbit. It ranges as close as 38 a.u. to the Sun in a 557-year orbit.



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