Re: Stars visible with naked eye

In article <4d81c801-dd7f-472c-b08e-e7d2e4759181@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
p4o2 <p4o2@xxxxxxxxx> wrote:
On Feb 21, 5:42=A0am, pau...@xxxxxxx (Paul Schlyter) wrote:
In article <fpj7o5$lj...@xxxxxxxxxxxxxxxxxxxxxxxxxx>,





Landy <no...@xxxxxxxxxxx> wrote:

"Landy" <no...@xxxxxxxxxxx> wrote in message
news:fpi2ea$n67$1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx

"p4o2" <p...@xxxxxxxxx> wrote in message
news:417f851d-7763-4e45-a47a-ffebdb779d1e@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=
.
How many of the stars visible with the naked eye are in our milky way?=

I think maybe they all are?

Ah, no. =A0Our own Sun would become invisible to the naked eye at about=

20-30 light years distance. =A0I would imagine we'd be lucky to see 1% =
of
them.
cheers
Bill

Just realized I misread the question. =A0I thought I was answering "are a=
ll
the stars in the milky way visible to the naked eye"

I misread the question too...... :-O

Almost all naked-eye stars are within our own galaxy. =A0I know of only
two exceptions:

S Andromedae - that star was a supernova within M31 (the Andromeda
galaxy) which briefly reached magnitude 6 in 1885. =A0Nobody is known
to actually have seen it with the naked eye, but it was briefly bright
enough to reach naked-eye visibility.

SN 1987A - this was another supernova, this time in the Large Magellanic
Cloud. =A0It peaked at magnitude 3, and was seen with the naked eye by
many people.

So, apart from occasional supernovae in the most nearby galaxies, all
naked-eye stars reside in our own galaxy.

--
----------------------------------------------------------------
Paul Schlyter, =A0Grev Turegatan 40, =A0SE-114 38 Stockholm, =A0SWEDEN
e-mail: =A0pausch at stjarnhimlen dot se
WWW: =A0 =A0http://stjarnhimlen.se/- Hide quoted text -

- Show quoted text -

Thanks for the replies. My question was about all the stars that we
can see and not a suggestion that we can see all the Milky Way stars.
A TV program that claimed that at some point in time the sky would be
MT because on the movement of every thing in the universe away from
each other. I think the members of the galaxies are not moving so our
stars should stay with us (at least until they go supervova).

Yep, the cosmological expansion causes galaxies to move away from one
another but it doesn't cause individual galaxies to grow. However,
the lifetime of the stars is limited, so eventually they'll go out.



--
----------------------------------------------------------------
Paul Schlyter, Grev Turegatan 40, SE-114 38 Stockholm, SWEDEN
e-mail: pausch at stjarnhimlen dot se
WWW: http://stjarnhimlen.se/
.

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