I've also posted this in the "café" section...

well, my entire question is stated in the title-line ... do we know of any confirmed planets in the Messier 84 galaxy? There doesn't appear to be too much information available! I realize there's an insanely massive black hole in the galaxy nucleus, so maybe that's sucked up all the planets!!


thanks in advance for your responses!

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that would have worked if you hadn't stopped me

I believe all known planets are within our own galaxy. Though Messier_84 surely contains a few million (or billion) planets, we have not yet discovered them.

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www.onlinetasklist.com

From: http://chandra.harvard.edu


Credit NASA/CXC/Stanford U./S.Allen et al.
Scale Image is 3.8 arcmin across
Coordinates (J2000) RA 12h 25m 03.60s | Dec +12º 53' 14.10"
Constellation Virgo
Observation Date 2000-05-19
Observation Time 8 hours

Distance Estimate About 55 million light years
Black Hole Mass 0.6 billion solar masses


Virgo Cluster Chart:

http://www.atlasoftheuniverse.com/galgrps/vir.gif


THE NUCLEAR IONIZED GAS IN THE RADIO GALAXY M84 (NGC 4374)1
GARY A. BOWER,2 TIMOTHY M. HECKMAN,3, 4 ANDREW S. WILSON,4, 5 AND DOUGLAS O. RICHSTONE6
Received 1997 February 4; accepted 1997 April 9


http://www.journals.uchicago.edu/ApJ/journal/issues/ApJL/v483n1/5074/5074.pdf


Very interesting place!


What brought your attention to this galaxy, Melt?

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"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." - Dr. Seuss

I've also posted this in the "café" section...

well, my entire question is stated in the title-line ... do we know of any confirmed planets in the Messier 84 galaxy? There doesn't appear to be too much information available! I realize there's an insanely massive black hole in the galaxy nucleus, so maybe that's sucked up all the planets!!


thanks in advance for your responses!

If there are stars there, then there must also be a lot of planets. The Black hole is not a factor here.

M84 is millions of lightyears away, though, much too far for us to detect any planets from here.
I'm not even sure we can detect planets 100 lightyears away yet. Does anyone know the answer to that?

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Ok, I believe the upper limit to where we can detect other large planets right now is less than 50 lightyears.

The M84 Galaxy is 55million lightyears away. Don't worry, though, there are 100billion candidate stars in just our own galaxy, which is much larger than average. In fact, I think ours is the most densely-packed cluster of stars in the entire local group of galaxies.

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Ok, I believe the upper limit to where we can detect other large planets right now is less than 50 lightyears.

The M84 Galaxy is 55million lightyears away. Don't worry, though, there are 100billion candidate stars in just our own galaxy, which is much larger than average. In fact, I think ours is the most densely-packed cluster of stars in the entire local group of galaxies.

There are also, supposably, millions of other galaxies too ;)

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"By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible". Hebrews 11.3

What brought your attention to this galaxy, Melt?

hello MrGray! -- I was (just for fun) studying each of Messier's 110 catalogued discoveries - as I proceeded to view each star cluster, nebula, and galaxy (one by one) - M84 and M82 both stood out. I guess you could say M84 is my "favorite" galaxy! haha!

thanks for all the info!

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that would have worked if you hadn't stopped me

Ok, after a little more study, I find that the maximum distance we've detected a planet sofar is about 70 lightyears.

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How could anybody ever see a planet at 55,000,000 light-years (16.87 million parsecs)? That's 1,687,000 standard units of distance. From one standard unit of 10 parsecs the Sun appears at magnitude 4.7. From that long distance the Sun would be 2.846 E12 times as dim or about 31.1 magnitudes dimmer or about magnitude 35.8. Do we have anything that can see that dim? Could we determine doppler shifts with anything that dim? Of course there are brighter stars.

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How could anybody ever see a planet at 55,000,000 light-years (16.87 million parsecs)? That's 1,687,000 standard units of distance. From one standard unit of 10 parsecs the Sun appears at magnitude 4.7. From that long distance the Sun would be 2.846 E12 times as dim or about 31.1 magnitudes dimmer or about magnitude 35.8. Do we have anything that can see that dim? Could we determine doppler shifts with anything that dim? Of course there are brighter stars.

The Spacecraft Voyager is beyond our solar syatem as we speak, and still going. I remember recently, but do not recall the date, that someone using a shortwave radio or something picked up Voyagers signal...(very faint though) At its last known location: it was about 15 billion kilometers (9.3 billion miles) from the sun.

So I am not sure HOW we can hear or see it and planets...but we can...

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"By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible". Hebrews 11.3