Posted on 03/16/2017 10:49:42 AM PDT by C19fan
Astronomers have just spotted a star whizzing around a vast black hole at about 2.5 times the distance between Earth and the Moon, and it takes only half an hour to complete one orbit.
To put that into perspective, it takes roughly 28 days for our Moon to do a single lap around our relatively tiny planet at speeds of 3,683 kilometres (2,288 miles) per hour, meaning this star is moving at some mind-boggling, break-neck speeds.
(Excerpt) Read more at sciencealert.com ...
“Therefore this is about 2 thousands miles per second.”
Something traveling that far and fast should have a stewardess on it.
I’ve always thought that many Galaxies look like they are “spiraling down the drain”
Look at your sink, bathtub, toilet, Whirlpoole, tornadoes, hurricanes, Great Red Spot...
Galaxies exploding outward would look more like a ball. We have (and many other galaxies have) spiral arms.
It appears we are also going down the drain in a few billion years!
Eventually it will be torn apart by gravity and there will be a huge energy release when it hits the event horizon...................
PINK FLOYD
“Time”
Ticking away the moments that make up a dull day
Fritter and waste the hours in an off-hand way
Kicking around on a piece of ground in your home town
Waiting for someone or something to show you the way
Tired of lying in the sunshine staying home to watch the rain
You are young and life is long and there is time to kill today
And then one day you find ten years have got behind you
No one told you when to run, you missed the starting gun
And you run and you run to catch up with the sun but it’s sinking
Racing around to come up behind you again
The sun is the same in a relative way, but you’re older
Shorter of breath and one day closer to death
Every year is getting shorter, never seem to find the time
Plans that either come to naught or half a page of scribbled lines
Hanging on in quiet desperation is the English way
The time is gone, the song is over, thought I’d something more to say
Home, home again
I like to be here when I can
When I come home cold and tired
It’s good to warm my bones beside the fire
Far away, across the field
The tolling of the iron bell
Calls the faithful to their knees
To hear the softly spoken magic spell ...........
So the star orbiting black hole is effectively “circling the drain” that’s why it’s moving so fast eventually it’s just going to go into the black hole
That is correct.
The center of each galaxy is a huge black hole that will eventually consume each galaxy and eventually even each other.....................then................BANG!........it begins again................
Not for very much longer...
That would be about 18.60 miles per second or 66,960 miles per hour.
"Ceterum censeo Islam esse delendam."
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
Yet another equivalent measure: going around the earth every 13 seconds for an object at 1% speed of light.
Very little relativistic effect (time slowing) at these speeds.
"Ceterum censeo Islam esse delendam."
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
Not much. Time Dilation
At 1% of c, the time dilation factor is 0.99995 (the clock on the orbiting object runs at .99995 times the rate of the clock "standing still")
And I hate relatives!!!
As you formulate it, your question doesn't make much sense.
Assuming that you are asking if, based upon an estimate of the mass of the visible star and its observed orbital period (and hence: orbital speed), can one calculate the mass of the black hole, then: Yes.
Assuming that the visible star is much less massive than the visible star (say, less than 10% the mass of the black hole), one can even neglect the mass of the visible star.
It is a 1st-year college physics level calculation.
Regards,
That roadrunner star is trying desperately to avoid being sucked into the black hole. It knows inherently that if it doesn’t move mighty fast, it is doomed forever.
We now see that “whizzing’ is the proper technical term for traveling at near-luminal velocities…
I am confused-—whizzing while traveling near the urinal velocities...what??
Bacon?
Crash, is that you?
Can the mass of the star and speed be used to conclude the attraction of the black hole?Assuming that you are asking if, based upon an estimate of the mass of the visible star and its observed orbital period (and hence: orbital speed), can one calculate the mass of the black hole, . . . It is a 1st-year college physics level calculation.Let’s see . . .earth’s mass is negligible compared to that of the sun, and earth orbits the sun once per year, at a radius of about 93 million miles.Or something like that . . .We’re told that the star orbits the black hole at a distance of about half the lunar distance of some 384,402 km, and that the velocity of the star orbiting the black hole is about 1% of the speed of light - i.e., 1% of 300,000 meters per second.
Newtonian physics - which is probably close enough of government work even when dealing with speeds of 1% of the speed of light - gives the relation between the mass of the black hole and the mass of our sun as being proportional to the square of the ratio of the orbital velocity of the star to that of the earth. And inversely proportional to ratio of the orbital distance of the star to the orbital distance of the earth.
Depends on what you mean by “% of”.
% of % is different from % of the number, which is the speed. Need more study to answer that, I’m afraid.
Yes, smile. Or something like that.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.