MAP

Friday, 12 February 2016

"EARTH - LIKE PLANETS HAVE EARTH - LIKE INTERIORS", February 8, 2016

1.“Will rocky exoplanets orbiting other stars have the same three layers? New research suggests that the answer is yes - they will have interiors very similar to Earth.”.

  2nd OPINION: 

  Because the main source of these elements is supernova blast.  I have already given new hypothesis for the  formation of Solar system on the basis of Dark atom & Dark energy. PULSATION plays important role.

  I ALREADY explained on 24th, July’ 2015 that ATOMIC COMPOSITION & CERTAIN CONDITION also decide the composition heavenly bodies.

  Reference:

  Kindly refer to the SLIDES OF MY ORAL PRESENTATION IN VIETNAM ON 24TH, JULY’ 2015 in an International Science conference on “Planetary System – a synergistic view” [19th- 25th July’ 2015]

  Title : “REGENERATION OF STAR & FORMATION OF SOLAR SYSTEM - Potter Man’s concept



2."The new code also can be applied to smaller, icier worlds like the moons and dwarf planets in the outer solar system. 

  “The model assumes that distant exo-planets have chemical compositions similar to Earth. This is reasonable based on the relevant abundances of key chemical elements like iron, magnesium, silicon, and oxygen in nearby systems.”

  2nd OPINION: 

  Yes, it is true that the composition of all the objects formed by the ejecta of the supernova blast are similar whether it is  planets, moon or asteroid belt or the exo-planet.

  MASS & SIZE of  planets, asteroids, exo-planets etc. are not dependent on their COMPOSITION. But all depend on the surrounding conditions. 

 Composition can also be related to the MASS & SIZE of others like Mother stars, Surrounding stars & nearby heavenly bodies [shielding effects]. 

  I also written the CRITERIA FOR FINDING HABITABLE PLANETS in my Vietnam presentation.

  Reference:

   Kindly refer to the SLIDES OF MY ORAL PRESENTATION IN VIETNAM ON 24TH, JULY’ 2015 in an International Science conference on “Planetary System – a synergistic view” [19th- 25th July’ 2015]

  Title : “REGENERATION OF STAR & FORMATION OF SOLAR SYSTEM - Potter Man’s concept

3.“Howeverplanets forming in more or less metal-rich regions of the galaxy could show different interior structures. The team expects to explore these questions in future research.

  2nd OPINION: 

  It is not a question of research because the planets formed in more or less metal reach region obviously has different composition. But HOW?& WHY? - is the topic of research. It is already explained by me on 24th , July’ 2015 in Vietnam Conference.

  The heavy element comes out first from the supernova is also WRITTEN BY ME ON



Every school kid learns the basic structure of the Earth: a thin outer crust, a thick mantle, and a Mars-sized core. But is this structure universal? Will rocky exoplanets orbiting other stars have the same three layers? New research suggests that the answer is yes - they will have interiors very similar to Earth.
"We wanted to see how Earth-like these rocky planets are. It turns out they are very Earth-like," says lead author Li Zeng of the Harvard-Smithsonian Center for Astrophysics (CfA).
To reach this conclusion Zeng and his co-authors applied a computer model known as the Preliminary Reference Earth Model (PREM), which is the standard model for Earth's interior. They adjusted it to accommodate different masses and compositions, and applied it to six known rocky exoplanets with well-measured masses and physical sizes.
They found that the other planets, despite their differences from Earth, all should have a nickel/iron core containing about 30 percent of the planet's mass. In comparison, about a third of the Earth's mass is in its core. The remainder of each planet would be mantle and crust, just as with Earth.
"We've only understood the Earth's structure for the past hundred years. Now we can calculate the structures of planets orbiting other stars, even though we can't visit them," adds Zeng.
The new code also can be applied to smaller, icier worlds like the moons and dwarf planets in the outer solar system. For example, by plugging in the mass and size of Pluto, the team finds that Pluto is about one-third ice (mostly water ice but also ammonia and methane ices).
The model assumes that distant exoplanets have chemical compositions similar to Earth. This is reasonable based on the relevant abundances of key chemical elements like iron, magnesium, silicon, and oxygen in nearby systems. However, planets forming in more or less metal-rich regions of the galaxy could show different interior structures. The team expects to explore these questions in future research.
The paper detailing this work, authored by Li Zeng, Dimitar Sasselov, and Stein Jacobsen (Harvard University), has been accepted for publication in The Astrophysical Journal and is available online.
More information: "Mass-Radius Relation for Rocky Planets Based on PREM," Li Zeng, Dimitar Sasselov & Stein Jacobsen (Harvard University), 2016, accepted for publication in the Astrophysical Journal arxiv.org/abs/1512.08827
Journal reference: Astrophysical Journal