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Author Topic: Stars and planets to view. New theories, discoveries included  (Read 22708 times)

Jimfarmer

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Re: Stars and planets to view. New theories, discoveries included
« Reply #45 on: November 02, 2018, 09:56:11 PM »
That's all new to me Barb.

Here's a definition of "Trojan" from the article:

Quote
To picture, say, Earth's Trojan asteroid, imagine the sun and Earth as being two points in a triangle whose sides are equal in length. The other point of such a triangle is known as a Trojan point, or a Lagrangian point, named after the mathematician who discovered them. At such a point, the gravitational attraction of the sun and Earth essentially balances out, meaning they are relatively stable points for asteroids or other objects.

Technically, the Lagrangian points do not provide stable parking spots for objects, because the slightest movement away from them puts the object in a position where the net gravitational attraction is no longer zero.  The spacecraft that are parked at Lagrangian points have to constantly apply small thrusts to move back into the zero-gravity spots.

Yowbarb

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Re: Stars and planets to view. New theories, discoveries included
« Reply #46 on: November 02, 2018, 11:51:47 PM »
Leak Project featured this ovoid trans-Neptunian object yesterday, recently named the 5th dwarf planet in our solar system, now at perihelion:

https://www.youtube.com/watch?v=XuepDq13k7A @ opening story



https://in-the-sky.org/news.php?id=20191020_13_100

R.R. thanks for posting this... wow what a strange object indeed, it has a really rapid rotation! Only a third the size of Earth. "THREE HAUMEAS COULD FIT SIDE BY SIDE IN EARTH."

"It takes 3.9 hours for Haumea to make a full rotation, which means it has by far the fastest spin, and thus shortest day, of any object in the solar system larger than 62 miles."


Haumea is a trans-Neptunian object; its orbit, in other words, is beyond that of the farthest ice giant in the solar system. Its discovery was reported to the International Astronomical Union in 2005, and its status as a dwarf planet—the fifth, after Ceres, Eris, Makemake, and Pluto—was made official three years later.

10 Facts About the Dwarf Planet Haumea | Mental Floss
mentalfloss.com/article/519236/facts-about-dwarf-planet-haumea

http://mentalfloss.com/article/519236/facts-about-dwarf-planet-haumea

R.R. Book

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Re: Stars and planets to view. New theories, discoveries included
« Reply #47 on: November 03, 2018, 05:42:36 AM »
I wonder if it is a natural object, or engineered?

R.R. Book

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Re: Stars and planets to view. New theories, discoveries included
« Reply #48 on: November 03, 2018, 06:35:27 AM »
Quote
Technically, the Lagrangian points do not provide stable parking spots for objects, because the slightest movement away from them puts the object in a position where the net gravitational attraction is no longer zero.  The spacecraft that are parked at Lagrangian points have to constantly apply small thrusts to move back into the zero-gravity spots.

Thanks Jim, for that clarification.

Jimfarmer

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Re: Stars and planets to view. New theories, discoveries included
« Reply #49 on: November 09, 2018, 07:54:23 PM »
Quote
Technically, the Lagrangian points do not provide stable parking spots for objects, because the slightest movement away from them puts the object in a position where the net gravitational attraction is no longer zero.  The spacecraft that are parked at Lagrangian points have to constantly apply small thrusts to move back into the zero-gravity spots.

Thanks Jim, for that clarification.

Oops!  Digging deeper, I discovered this:
" The unstable Lagrange points - labeled L1, L2 and L3 - lie along the line connecting the two large masses. The stable Lagrange points - labeled L4 and L5 - form the apex of two equilateral triangles that have the large masses at their vertices. L4 leads the orbit of earth and L5 follows "

R.R. Book

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Re: Stars and planets to view. New theories, discoveries included
« Reply #50 on: November 10, 2018, 06:03:05 AM »
Thanks!  Found this image for visual learners:


Yowbarb

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Re: Stars and planets to view. New theories, discoveries included
« Reply #51 on: August 02, 2019, 06:09:02 PM »
Yowbarb Note-
This exoplanet, discovered in 2017 was mentioned in Suspicious0bservers video today. It is 900 light years away, probably Too far away to have anything to do with the PX system. Interesting though! This is the first time heavy metals were detected escaping from an exoplanet.
...

https://hubblesite.org/contents/news-releases/2019/news-2019-19

HUBBLE UNCOVERS A 'HEAVY METAL' EXOPLANET SHAPED LIKE A FOOTBALL
August 01, 2019 10:00AM (EDT) Release ID: 2019-19

HEAVY ELEMENTS DETECTED FOR FIRST TIME ESCAPING EXOPLANET
The scorching hot exoplanet WASP-121b represents a new twist on the phrase "heavy metal."

There are no loud electric guitar riffs, characteristic of heavy metal music, streaming into space. What is escaping the planet is iron and magnesium gas, dubbed heavy metals, because they are heavier than lightweight hydrogen and helium. The observations by the Hubble Space Telescope represent the first time heavy metal gas has been detected floating away from an exoplanet.

A scorching planet, WASP-121b orbits precariously close to a star that is even hotter than our Sun. The intense radiation heats the planet's upper atmosphere to a blazing 4,600 degrees Fahrenheit. Apparently, the lower atmosphere is still so hot that iron and magnesium remain in gaseous form and stream to the upper atmosphere, where they escape into space on the coattails of hydrogen and helium gas.

The sizzling planet is also so close to its star that it is on the cusp of being ripped apart by the star's intense pull. This hugging distance means that the planet is stretched into a football shape due to gravitational tidal forces.

How can a planet be "hotter than hot?" The answer is when heavy metals are detected escaping from the planet's atmosphere, instead of condensing into clouds.

Observations by NASA's Hubble Space Telescope reveal magnesium and iron gas streaming from the strange world outside our solar system known as WASP-121b. The observations represent the first time that so-called "heavy metals"—elements heavier than hydrogen and helium—have been spotted escaping from a hot Jupiter, a large, gaseous exoplanet very close to its star.

Normally, hot Jupiter-sized planets are still cool enough inside to condense heavier elements such as magnesium and iron into clouds.

But that's not the case with WASP-121b, which is orbiting so dangerously close to its star that its upper atmosphere reaches a blazing 4,600 degrees Fahrenheit. The WASP-121 system resides about 900 light-years from Earth.

"Heavy metals have been seen in other hot Jupiters before, but only in the lower atmosphere," explained lead researcher David Sing of the Johns Hopkins University in Baltimore, Maryland. "So you don't know if they are escaping or not. With WASP-121b, we see magnesium and iron gas so far away from the planet that they're not gravitationally bound."

Ultraviolet light from the host star, which is brighter and hotter than the Sun, heats the upper atmosphere and helps lead to its escape. In addition, the escaping magnesium and iron gas may contribute to the temperature spike, Sing said. "These metals will make the atmosphere more opaque in the ultraviolet, which could be contributing to the heating of the upper atmosphere," he explained.

The sizzling planet is so close to its star that it is on the cusp of being ripped apart by the star's gravity. This hugging distance means that the planet is football shaped due to gravitational tidal forces.

"We picked this planet because it is so extreme," Sing said. "We thought we had a chance of seeing heavier elements escaping. It's so hot and so favorable to observe, it's the best shot at finding the presence of heavy metals. We were mainly looking for magnesium, but there have been hints of iron in the atmospheres of other exoplanets. It was a surprise, though, to see it so clearly in the data and at such great altitudes so far away from the planet. The heavy metals are escaping partly because the planet is so big and puffy that its gravity is relatively weak. This is a planet being actively stripped of its atmosphere."

The researchers used the observatory's Space Telescope Imaging Spectrograph to search in ultraviolet light for the spectral signatures of magnesium and iron imprinted on starlight filtering through WASP-121b's atmosphere as the planet passed in front of, or transited, the face of its home star.

This exoplanet is also a perfect target for NASA's upcoming James Webb Space Telescope to search in infrared light for water and carbon dioxide, which can be detected at longer, redder wavelengths. The combination of Hubble and Webb observations would give astronomers a more complete inventory of the chemical elements that make up the planet's atmosphere.

The WASP-121b study is part of the Panchromatic Comparative Exoplanet Treasury (PanCET) survey, a Hubble program to look at 20 exoplanets, ranging in size from super-Earths (several times Earth's mass) to Jupiters (which are over 100 times Earth's mass), in the first large-scale ultraviolet, visible, and infrared comparative study of distant worlds.

The observations of WASP-121b add to the developing story of how planets lose their primordial atmospheres. When planets form, they gather an atmosphere containing gas from the disk in which the planet and star formed. These atmospheres consist mostly of the primordial, lighter-weight gases hydrogen and helium, the most plentiful elements in the universe. This atmosphere dissipates as a planet moves closer to its star.

"The hot Jupiters are mostly made of hydrogen, and Hubble is very sensitive to hydrogen, so we know these planets can lose the gas relatively easily," Sing said. "But in the case of WASP-121b, the hydrogen and helium gas is outflowing, almost like a river, and is dragging these metals with them. It's a very efficient mechanism for mass loss."

The results will appear online today in The Astronomical Journal.

The Hubble Space Telescope is a project of international cooperation between NASA and ESA (European Space Agency). NASA's Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore, Maryland, conducts Hubble science operations. STScI is operated for NASA by the Association of Universities for Research in Astronomy in Washington, D.C.

CREDITS:   CREDITS:
Artwork: NASA, ESA, and J. Olmsted (STScI);
Science: NASA, ESA, and D. Sing (Johns Hopkins University)


Yowbarb

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Re: Stars and planets to view. New theories, discoveries included
« Reply #52 on: August 02, 2019, 06:13:02 PM »
Quote
Technically, the Lagrangian points do not provide stable parking spots for objects, because the slightest movement away from them puts the object in a position where the net gravitational attraction is no longer zero.  The spacecraft that are parked at Lagrangian points have to constantly apply small thrusts to move back into the zero-gravity spots.

Thanks Jim, for that clarification.

Oops!  Digging deeper, I discovered this:
" The unstable Lagrange points - labeled L1, L2 and L3 - lie along the line connecting the two large masses. The stable Lagrange points - labeled L4 and L5 - form the apex of two equilateral triangles that have the large masses at their vertices. L4 leads the orbit of earth and L5 follows "
Jimfarmer, great posts. R.R. too!

Yowbarb

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Re: Stars and planets to view. New theories, discoveries included
« Reply #53 on: August 02, 2019, 06:39:39 PM »
Yowbarb Note: Our galaxy is not a flat sheet, is is curved. This info brought forward by Suspicious0bservers in this video, interview with the scientist, Dr. Peratt'.  Note: There are more interesting ideas and discoveries in this video.
...
Plasma Cosmology: https://youtu.be/E4pWZGBpWP0

Plasma Cosmology contains interviews with top professors and government scientists, examining the problems with the prevailing dark matter paradigm. Dr. Peratt describes what the government learned and classified during secret nuclear tests underground.

~30 minutes in, the tables turn completely
~43 minutes in, the bomb drops, both literally and figuratively

Dr. Peratt's Book: https://www.amazon.com/Physics-Plasma...

The song Future Gladiator by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/music/royalty-...
Artist: http://incompetech.com/
Category
News & Politics
323 Comments
...
Suspicious0bservers
1 day ago (edited)
Dr. Peratt's comments from around the 42min mark should shake the foundation of cosmological physics. I have been assured that I have no liability for sharing these words and neither does he - we still aren't allowed to see the data or the models or visit the site or even know where in Nevada it was. Simply because you see fire and know its real, doesn't mean you can make it. Few people have ever been so privileged as the 0bservers are today, to be able to deliver such information as has never been heard before, in a manner that can be consumed by entire physics community.



 

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