Why was M87 targetted for the Event Horizon Telescope instead of Sagittarius A*? The 2019 Stack Overflow Developer Survey Results Are InHow is the mass of black hole at the center of our galaxy measured?Understanding Black hole information paradox?Geometry inside the event horizonWhat happens to the wavelength/frequency of a photon as it passes through an event horizon?Why the center of our galaxy doesn't absorb us?How Can Anything Escape A Supermassive Black Hole?Are black holes in a binary system with white holes, and are they both wormholes?Observer inside event horizon of an extremely large black holeIs it possible the space-time manifold itself could stop at a black hole's event horizon?Picture of Sgr A*
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Why was M87 targetted for the Event Horizon Telescope instead of Sagittarius A*?
The 2019 Stack Overflow Developer Survey Results Are InHow is the mass of black hole at the center of our galaxy measured?Understanding Black hole information paradox?Geometry inside the event horizonWhat happens to the wavelength/frequency of a photon as it passes through an event horizon?Why the center of our galaxy doesn't absorb us?How Can Anything Escape A Supermassive Black Hole?Are black holes in a binary system with white holes, and are they both wormholes?Observer inside event horizon of an extremely large black holeIs it possible the space-time manifold itself could stop at a black hole's event horizon?Picture of Sgr A*
$begingroup$
First image of a black hole has been released today April 10th, 2019. The team targeted the black hole at the center of the M87 galaxy.
Why didn't the team target the Sagittarius A* at the center of our own galaxy. Intuitively, it would seem to be a better target as it is closer to us.
black-holes astronomy event-horizon
edited 12 hours ago
Qmechanic♦
107k122001241
asked 12 hours ago
MaxterMaxter
14210
$endgroup$
add a comment |
$begingroup$
First image of a black hole has been released today April 10th, 2019. The team targeted the black hole at the center of the M87 galaxy.
Why didn't the team target the Sagittarius A* at the center of our own galaxy. Intuitively, it would seem to be a better target as it is closer to us.
black-holes astronomy event-horizon
edited 12 hours ago
Qmechanic♦
107k122001241
asked 12 hours ago
MaxterMaxter
14210
$endgroup$
5
$begingroup$
Related question on Astronomy Stack Exchange: astronomy.stackexchange.com/q/30313/2153.
$endgroup$
– HDE 226868
12 hours ago
2
$begingroup$
On the EHT website it says that there was too much activity at A* to get a good picture
$endgroup$
– Halbeard
10 hours ago
add a comment |
$begingroup$
First image of a black hole has been released today April 10th, 2019. The team targeted the black hole at the center of the M87 galaxy.
Why didn't the team target the Sagittarius A* at the center of our own galaxy. Intuitively, it would seem to be a better target as it is closer to us.
black-holes astronomy event-horizon
edited 12 hours ago
Qmechanic♦
107k122001241
asked 12 hours ago
MaxterMaxter
14210
$endgroup$
First image of a black hole has been released today April 10th, 2019. The team targeted the black hole at the center of the M87 galaxy.
Why didn't the team target the Sagittarius A* at the center of our own galaxy. Intuitively, it would seem to be a better target as it is closer to us.
black-holes astronomy event-horizon
black-holes astronomy event-horizon
edited 12 hours ago
Qmechanic♦
107k122001241
asked 12 hours ago
MaxterMaxter
14210
edited 12 hours ago
Qmechanic♦
107k122001241
asked 12 hours ago
MaxterMaxter
14210
edited 12 hours ago
Qmechanic♦
107k122001241
edited 12 hours ago
Qmechanic♦
107k122001241
edited 12 hours ago
Qmechanic♦
107k122001241
107k122001241
asked 12 hours ago
MaxterMaxter
14210
asked 12 hours ago
MaxterMaxter
14210
asked 12 hours ago
MaxterMaxter
14210
14210
5
$begingroup$
Related question on Astronomy Stack Exchange: astronomy.stackexchange.com/q/30313/2153.
$endgroup$
– HDE 226868
12 hours ago
2
$begingroup$
On the EHT website it says that there was too much activity at A* to get a good picture
$endgroup$
– Halbeard
10 hours ago
add a comment |
5
$begingroup$
Related question on Astronomy Stack Exchange: astronomy.stackexchange.com/q/30313/2153.
$endgroup$
– HDE 226868
12 hours ago
2
$begingroup$
On the EHT website it says that there was too much activity at A* to get a good picture
$endgroup$
– Halbeard
10 hours ago
5
5
$begingroup$
Related question on Astronomy Stack Exchange: astronomy.stackexchange.com/q/30313/2153.
$endgroup$
– HDE 226868
12 hours ago
$begingroup$
Related question on Astronomy Stack Exchange: astronomy.stackexchange.com/q/30313/2153.
$endgroup$
– HDE 226868
12 hours ago
2
2
$begingroup$
On the EHT website it says that there was too much activity at A* to get a good picture
$endgroup$
– Halbeard
10 hours ago
$begingroup$
On the EHT website it says that there was too much activity at A* to get a good picture
$endgroup$
– Halbeard
10 hours ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
Of course they targeted Sgr A* as well.
I think though that this is a more difficult target to get good images of.
The black hole is about 1500 times less massive than in M87, but is about 2000 times closer. So the angular scale of the event horizons should be similar. However Sgr A* is a fairly dormant black hole and may not be illuminated so well, and there is more scattering material between us and it than in M87.
A bigger problem may be variability timescales. The black hole in M87 is light days across, so images can be combined across several days of observing. Sgr A* is light minutes across, so rapid variability could be a problem.
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
$endgroup$
1
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
add a comment |
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1 Answer
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1 Answer
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$begingroup$
Of course they targeted Sgr A* as well.
I think though that this is a more difficult target to get good images of.
The black hole is about 1500 times less massive than in M87, but is about 2000 times closer. So the angular scale of the event horizons should be similar. However Sgr A* is a fairly dormant black hole and may not be illuminated so well, and there is more scattering material between us and it than in M87.
A bigger problem may be variability timescales. The black hole in M87 is light days across, so images can be combined across several days of observing. Sgr A* is light minutes across, so rapid variability could be a problem.
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
$endgroup$
1
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
add a comment |
$begingroup$
Of course they targeted Sgr A* as well.
I think though that this is a more difficult target to get good images of.
The black hole is about 1500 times less massive than in M87, but is about 2000 times closer. So the angular scale of the event horizons should be similar. However Sgr A* is a fairly dormant black hole and may not be illuminated so well, and there is more scattering material between us and it than in M87.
A bigger problem may be variability timescales. The black hole in M87 is light days across, so images can be combined across several days of observing. Sgr A* is light minutes across, so rapid variability could be a problem.
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
$endgroup$
1
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
add a comment |
$begingroup$
Of course they targeted Sgr A* as well.
I think though that this is a more difficult target to get good images of.
The black hole is about 1500 times less massive than in M87, but is about 2000 times closer. So the angular scale of the event horizons should be similar. However Sgr A* is a fairly dormant black hole and may not be illuminated so well, and there is more scattering material between us and it than in M87.
A bigger problem may be variability timescales. The black hole in M87 is light days across, so images can be combined across several days of observing. Sgr A* is light minutes across, so rapid variability could be a problem.
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
$endgroup$
Of course they targeted Sgr A* as well.
I think though that this is a more difficult target to get good images of.
The black hole is about 1500 times less massive than in M87, but is about 2000 times closer. So the angular scale of the event horizons should be similar. However Sgr A* is a fairly dormant black hole and may not be illuminated so well, and there is more scattering material between us and it than in M87.
A bigger problem may be variability timescales. The black hole in M87 is light days across, so images can be combined across several days of observing. Sgr A* is light minutes across, so rapid variability could be a problem.
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
edited 11 hours ago
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
answered 11 hours ago
Rob JeffriesRob Jeffries
70.7k7145245
70.7k7145245
1
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
add a comment |
1
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
1
1
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I was going to protest this answer, but now just have a catch to add. In some places (looking at you, Veritasium) a simulated image of SgrA* is easy to mistake as a genuine photo. Now I understand why SgrA* isn't even in the press release. The circulating SgrA* image is just a simulation. See source material and comments section: youtu.be/VnsZj9RvhFU
$endgroup$
– World Outsider
6 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
$begingroup$
I'd intuitively think that dust in the disk of our galaxy plays a part by obscuring the innermost regions.
$endgroup$
– Allure
5 hours ago
add a comment |
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$begingroup$
Related question on Astronomy Stack Exchange: astronomy.stackexchange.com/q/30313/2153.
$endgroup$
– HDE 226868
12 hours ago
2
$begingroup$
On the EHT website it says that there was too much activity at A* to get a good picture
$endgroup$
– Halbeard
10 hours ago