Nearest exoplanet

How far away is it? Barnard's star or further?

cheres!!!

S-S

Starlight-Starbright wrote:

How far away is it? Barnard's star or further?

cheres!!!

S-

http://www.hobrad.com/astnotes.htm
"...(the nearest of the sunlike stars with planets, Epsilon Eridani, is 10.5
light-years from Earth), observation has been almost entirely indirect,
based on radial velocity (the gravitational wobble or motion of the parent
stars)." Gliese 876 at 15 ly appears to be the second closest.

Also see, http://planetquest1.jpl.nasa.gov/atlas/atlas_search.cfm

Hello, in the case of Epsilon Eridani there are a few reports loosely
referred to as UFO reports where the "Aliens" indicated that they originated
from there. I think it was the Betty and Barney case in America. The
psychiatrists and Christian leaders discredited the case as they usually do.

However of a planetary system around this star just put some credence on the
UFO report.

I read that there is a planetary system of at least three planets orbiting
Barnards star. However the measurements of the wobble were over a hundred
years and Christian Scientists have used this as an excuse to point to
optical defects in the telescope as the cause. Other obervations by modern
instruments have confirmed the wobble but the integrating time has not been
sufficient to sort out the number of planets. Only one Jupiter sized planet
is suspected so far. The original measurements indicated that the other
planets were lighter and in smaller orbits.

Life on other planets means that "I am not immortal" so watch out for the
Christian thought police.

Chris.

"Klaatu" wrote in message
m...
Starlight-Starbright wrote:

How far away is it? Barnard's star or further?

cheres!!!

S-

http://www.hobrad.com/astnotes.htm
"...(the nearest of the sunlike stars with planets, Epsilon Eridani, is
10.5
light-years from Earth), observation has been almost entirely indirect,
based on radial velocity (the gravitational wobble or motion of the parent
stars)." Gliese 876 at 15 ly appears to be the second closest.

Also see, http://planetquest1.jpl.nasa.gov/atlas/atlas_search.cfm

Chris wrote:
Hello, in the case of Epsilon Eridani there are a few reports loosely
referred to as UFO reports where the "Aliens" indicated that they originated
from there. I think it was the Betty and Barney case in America. The
psychiatrists and Christian leaders discredited the case as they usually do.

However of a planetary system around this star just put some credence on the
UFO report.

I read that there is a planetary system of at least three planets orbiting
Barnards star. However the measurements of the wobble were over a hundred
years and Christian Scientists have used this as an excuse to point to
optical defects in the telescope as the cause. Other obervations by modern
instruments have confirmed the wobble but the integrating time has not been
sufficient to sort out the number of planets. Only one Jupiter sized planet
is suspected so far. The original measurements indicated that the other
planets were lighter and in smaller orbits.

Life on other planets means that "I am not immortal" so watch out for the
Christian thought police.

Chris.

With the clever use of your favourite browser and the first result
returned by Google, you would have found the following :

http://www.solstation.com/stars/eps-erid.htm

"The Star [Epsilon Eridani]

This main sequence, orange-red dwarf (K2 V) is a relative young star
that may be only 500 million to a billion years old. It may have about
85 percent of Sol's mass (RECONS), 84 percent of its diameter (Johnson
and Wright, 1983, page 653), but only about 27.8 percent of its
luminosity (Saumon et al, 1996, page 17). The European Space Agency has
used ultraviolet spectral flux distribution data to determine stellar
effective temperatures and surface gravities, including those of Epsilon
Eridani."

The star's young age of "only 500 million to a billion years" makes it
an unlikely source of space-faring aliens! You need a bit more time for
aliens to develop! If you are very lucky, there might be some primitive
organisms growing on the soil or near undersea vents right now. Give
them a few billion years more to develop into a radio-civilization and
another few thousand and then, just maybe, if they haven't destroyed
themselves or their planet, they might be visiting other planets! Good
luck.

Arnold wrote:

With the clever use of your favourite browser and the first result
returned by Google, you would have found the following :

http://www.solstation.com/stars/eps-erid.htm

"The Star [Epsilon Eridani]

This main sequence, orange-red dwarf (K2 V) is a relative young star
that may be only 500 million to a billion years old. It may have about
85 percent of Sol's mass (RECONS), 84 percent of its diameter (Johnson
and Wright, 1983, page 653), but only about 27.8 percent of its
luminosity (Saumon et al, 1996, page 17). The European Space Agency has
used ultraviolet spectral flux distribution data to determine stellar
effective temperatures and surface gravities, including those of Epsilon
Eridani."

The star's young age of "only 500 million to a billion years" makes it
an unlikely source of space-faring aliens! You need a bit more time for
aliens to develop! If you are very lucky, there might be some primitive
organisms growing on the soil or near undersea vents right now. Give
them a few billion years more to develop into a radio-civilization and
another few thousand and then, just maybe, if they haven't destroyed
themselves or their planet, they might be visiting other planets! Good
luck.

I forgot to add that the same reasoning applies to claims of aliens
coming from the Pleiades or other young stars or clusters.
Another popular star for alien origins is Vega - remember Carl Sagan's
'Contact'?

http://www.astro.uiuc.edu/~kaler/sow/vega.html
"Several other stars similar to Vega (Fomalhaut, Denebola, Merak, for
example) possess similar disks, and astronomers speculate that they may
indicate the existence of planetary systems, though no planets have ever
been detected. Even if they exist, it seems unlikely that life would
have developed to any degree because of the short lifetimes of these hot
stars."


--
25° 45' S
28° 12' E
GMT+2

Join the Planetary Society
http://www.planetary.org

Well there must be lots more stars to choose from. Do you know any
canditates stars about 4.5 Billion years old, main sequence like the sun
that are near enough to be of any interest as possible origin stars of these
alien reports. I doubt if the usual contactees have any atrononominal
knowledge. The last contactee I heard of is now incarcerated in a mental
hospital with a possible hole in her head and is learning new skill as on
office clerk.



Chris.

"Arnold" wrote in message
...
Arnold wrote:

With the clever use of your favourite browser and the first result
returned by Google, you would have found the following :

http://www.solstation.com/stars/eps-erid.htm

"The Star [Epsilon Eridani]

This main sequence, orange-red dwarf (K2 V) is a relative young star that
may be only 500 million to a billion years old. It may have about 85
percent of Sol's mass (RECONS), 84 percent of its diameter (Johnson and
Wright, 1983, page 653), but only about 27.8 percent of its luminosity
(Saumon et al, 1996, page 17). The European Space Agency has used
ultraviolet spectral flux distribution data to determine stellar
effective temperatures and surface gravities, including those of Epsilon
Eridani."

The star's young age of "only 500 million to a billion years" makes it an
unlikely source of space-faring aliens! You need a bit more time for
aliens to develop! If you are very lucky, there might be some primitive
organisms growing on the soil or near undersea vents right now. Give
them a few billion years more to develop into a radio-civilization and
another few thousand and then, just maybe, if they haven't destroyed
themselves or their planet, they might be visiting other planets! Good
luck.

I forgot to add that the same reasoning applies to claims of aliens coming
from the Pleiades or other young stars or clusters.
Another popular star for alien origins is Vega - remember Carl Sagan's
'Contact'?

http://www.astro.uiuc.edu/~kaler/sow/vega.html
"Several other stars similar to Vega (Fomalhaut, Denebola, Merak, for
example) possess similar disks, and astronomers speculate that they may
indicate the existence of planetary systems, though no planets have ever
been detected. Even if they exist, it seems unlikely that life would have
developed to any degree because of the short lifetimes of these hot
stars."


--
25° 45' S
28° 12' E
GMT+2

Join the Planetary Society
http://www.planetary.org

Why are you insisting that your SETI ETs are not only biologically
blind but otherwise as pathetic, as more bigoted, as more arrogant and
just plain old dumb and dumber than Earth humans?

Isn't being easily snookered and thus more dumbfounded than humans
somewhat impossible?

5 AU away from Sirius-a isn't such a bad spot for a Venus like planet,
even if once in a while the likes of Sirius-b is attempting to TBI
exterminate your sorry butt, as hardly any of nasty radiation would
manage to get through that amount of atmosphere.

Why can't a few smart ET (planetary terraformers) make a go of it upon
our Venus?
~

This is about my basic Township, Bridge & Tarmac upon Venus:
http://guthvenus.tripod.com/gv-town.htm
China/Russian LSE-CM/ISS (Lunar Space Elevator)
http://guthvenus.tripod.com/lunar-space-elevator.htm
A few alternative topics from wizard Brad Guth / GASA-IEIS
http://guthvenus.tripod.com/gv-topics.htm

Thanks for that. Obvously it was the wrong star.

Chris.

"Arnold" wrote in message
...
Chris wrote:
Hello, in the case of Epsilon Eridani there are a few reports loosely
referred to as UFO reports where the "Aliens" indicated that they
originated from there. I think it was the Betty and Barney case in
America. The psychiatrists and Christian leaders discredited the case as
they usually do.

However of a planetary system around this star just put some credence on
the UFO report.

I read that there is a planetary system of at least three planets
orbiting Barnards star. However the measurements of the wobble were over
a hundred years and Christian Scientists have used this as an excuse to
point to optical defects in the telescope as the cause. Other
obervations by modern instruments have confirmed the wobble but the
integrating time has not been sufficient to sort out the number of
planets. Only one Jupiter sized planet is suspected so far. The
original measurements indicated that the other planets were lighter and
in smaller orbits.

Life on other planets means that "I am not immortal" so watch out for the
Christian thought police.

Chris.

With the clever use of your favourite browser and the first result
returned by Google, you would have found the following :

http://www.solstation.com/stars/eps-erid.htm

"The Star [Epsilon Eridani]

This main sequence, orange-red dwarf (K2 V) is a relative young star that
may be only 500 million to a billion years old. It may have about 85
percent of Sol's mass (RECONS), 84 percent of its diameter (Johnson and
Wright, 1983, page 653), but only about 27.8 percent of its luminosity
(Saumon et al, 1996, page 17). The European Space Agency has used
ultraviolet spectral flux distribution data to determine stellar effective
temperatures and surface gravities, including those of Epsilon Eridani."

The star's young age of "only 500 million to a billion years" makes it an
unlikely source of space-faring aliens! You need a bit more time for
aliens to develop! If you are very lucky, there might be some primitive
organisms growing on the soil or near undersea vents right now. Give them
a few billion years more to develop into a radio-civilization and another
few thousand and then, just maybe, if they haven't destroyed themselves or
their planet, they might be visiting other planets! Good luck.

Arnold wrote:
The star's young age of "only 500 million to a billion years" makes it
an unlikely source of space-faring aliens! You need a bit more time for
aliens to develop!

It depends, maybe those aliens didn't originate from there.

Traveling at 1% of the speed of the light you cover a light
year in a century. In a few thousand years you can make 30-40
light years, enough to get from one star to the other.

If the system is 500 million years old, there is ample opportunity
for the UFOs to get going even with very basic technology
(relatively speaking of course).

They could just have established a base over there.

Earth would be interesting to them due to the strong
and "unexplained" radio emission, a sure sign of a
primitive civilization. Besides, if we are starting to
figure out how many planets are there, they could have
figured out the solar system since a long time.

With a technology such as a slightly better New Generation
Scope that we will have in a few years, they could have
discovered the imbalance in the earth atmosphere since quite
a few million years. Another sure sign of life.

At 10.5 light years from us they are listening to the
"latest hits" radio emissions from the nineties, and
watching Bush father loose the elections.

A very big radio-telescope, at near absolute zero
pointed at the earth could listen to the individual
stations, and learn a lot about us without the effort
of coming here at all.

But maybe this is the reason why they do not come.

As TV shows go, they would surely have no interest in
such a stupid and violent race like us.

Funds for earth exploration would be scarce. At
most they would send a few robots if any...

In article ,
jacob navia wrote:

Earth would be interesting to them due to the strong
and "unexplained" radio emission, a sure sign of a

The radio leakage is very weak at interstellar distances.

A very big radio-telescope, at near absolute zero

Very big (probably continent or planet sized), yes, but
there is no benefit in being near absolute zero, because:

- receiver noises can be much lower than ambient even without
cryogenic cooling (e.g. the current SERENDIP/S@H receivers
have equivalent noise temperatures in the mid 20K range, but
are not cryogenically cooled - they are reportedly quieter
than the original cryogenically cooled ones);

- at the frequencies at which the broadcasts were made, galactic
synchrotron radiation means that the sky noise varies from comparable
to to many times earth ambient temperature (for radio, at around 100MHz,
it is certainly going to several times earth ambient).

pointed at the earth could listen to the individual
stations, and learn a lot about us without the effort
of coming here at all.