Why does the Event Horizon Telescope (EHT) not include telescopes from Africa, Asia or Australia? The 2019 Stack Overflow Developer Survey Results Are In Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Why does the Gaia space telescope have two main mirrorsWhy would the James Webb Space Telescope need adaptive optics outside the atmosphere?Why doesn't thermal radio emission from a DSN “hot dish” completely swamp the benefits of a cold LNA?Why the thermal imaging of Mercury's surface requires a telescope on a jet flying through an eclipse?To use a gravitational lens as a telescope, does the hypothetical user have to do so from a given angle?Why are so many space telescopes placed in LEO instead of at Lagrange Points? And why do we hear about Hubble more than any Langrange-orbit telescope?What causes these cross-shaped artifacts in TESS' first images?What might the first deep space telescope using the Sun or Jupiter as a gravitational lens be like?Why will radioastronomy telescopes be used to listen to InSight's entry into Mars' atmosphere instead of DSN?Why is the Hubble Space Telescope mass increasing?
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Why does the Event Horizon Telescope (EHT) not include telescopes from Africa, Asia or Australia?
The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Why does the Gaia space telescope have two main mirrorsWhy would the James Webb Space Telescope need adaptive optics outside the atmosphere?Why doesn't thermal radio emission from a DSN “hot dish” completely swamp the benefits of a cold LNA?Why the thermal imaging of Mercury's surface requires a telescope on a jet flying through an eclipse?To use a gravitational lens as a telescope, does the hypothetical user have to do so from a given angle?Why are so many space telescopes placed in LEO instead of at Lagrange Points? And why do we hear about Hubble more than any Langrange-orbit telescope?What causes these cross-shaped artifacts in TESS' first images?What might the first deep space telescope using the Sun or Jupiter as a gravitational lens be like?Why will radioastronomy telescopes be used to listen to InSight's entry into Mars' atmosphere instead of DSN?Why is the Hubble Space Telescope mass increasing?
$begingroup$
The Event Horizon Telescope seems to include these radio telescopes currently:
Image by European Southern Observatory (ESO)/O. Furtak; CC-BY 4.0-licensed, see the source on Wikipedia Commons and the original image link.
See also the map and list on their official website.
It is also said, that it has a “effective diameter of the entire planet”.
But it's striking, it does not include half-of the earth… It has no telescopes in Africa, Asia or Australia.
So:
- Why were not they included?
- Would it increase the diameter if they would include some from there? If so, again why did not they? (😉)
- Or, similarly asked: How can it be the diameter of the earth if only half-the-earth is included in the network?
Please try to explain it in a simple way first. I am no astronomer.
What I've noticed so far when skimming their official pages is that they write here:
As more telescopes are added to the EHT, we will be able to produce images of the emission around black holes. In general, the fidelity of images produced by an interferometric array increases as additional telescopes are added to the array.
This seems to support my question of why they did not use possibilities in Asia or so…
I guess, it would also make sense to have a more or less uniform distribution across the planet (or does not this matter?), that's why a "dot" in Africa might make sense too…
space-telescope radio-telescope
asked 1 hour ago
rugkrugk
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$begingroup$
The Event Horizon Telescope seems to include these radio telescopes currently:
Image by European Southern Observatory (ESO)/O. Furtak; CC-BY 4.0-licensed, see the source on Wikipedia Commons and the original image link.
See also the map and list on their official website.
It is also said, that it has a “effective diameter of the entire planet”.
But it's striking, it does not include half-of the earth… It has no telescopes in Africa, Asia or Australia.
So:
- Why were not they included?
- Would it increase the diameter if they would include some from there? If so, again why did not they? (😉)
- Or, similarly asked: How can it be the diameter of the earth if only half-the-earth is included in the network?
Please try to explain it in a simple way first. I am no astronomer.
What I've noticed so far when skimming their official pages is that they write here:
As more telescopes are added to the EHT, we will be able to produce images of the emission around black holes. In general, the fidelity of images produced by an interferometric array increases as additional telescopes are added to the array.
This seems to support my question of why they did not use possibilities in Asia or so…
I guess, it would also make sense to have a more or less uniform distribution across the planet (or does not this matter?), that's why a "dot" in Africa might make sense too…
space-telescope radio-telescope
asked 1 hour ago
rugkrugk
1162
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
The Event Horizon Telescope seems to include these radio telescopes currently:
Image by European Southern Observatory (ESO)/O. Furtak; CC-BY 4.0-licensed, see the source on Wikipedia Commons and the original image link.
See also the map and list on their official website.
It is also said, that it has a “effective diameter of the entire planet”.
But it's striking, it does not include half-of the earth… It has no telescopes in Africa, Asia or Australia.
So:
- Why were not they included?
- Would it increase the diameter if they would include some from there? If so, again why did not they? (😉)
- Or, similarly asked: How can it be the diameter of the earth if only half-the-earth is included in the network?
Please try to explain it in a simple way first. I am no astronomer.
What I've noticed so far when skimming their official pages is that they write here:
As more telescopes are added to the EHT, we will be able to produce images of the emission around black holes. In general, the fidelity of images produced by an interferometric array increases as additional telescopes are added to the array.
This seems to support my question of why they did not use possibilities in Asia or so…
I guess, it would also make sense to have a more or less uniform distribution across the planet (or does not this matter?), that's why a "dot" in Africa might make sense too…
space-telescope radio-telescope
asked 1 hour ago
rugkrugk
1162
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
The Event Horizon Telescope seems to include these radio telescopes currently:
Image by European Southern Observatory (ESO)/O. Furtak; CC-BY 4.0-licensed, see the source on Wikipedia Commons and the original image link.
See also the map and list on their official website.
It is also said, that it has a “effective diameter of the entire planet”.
But it's striking, it does not include half-of the earth… It has no telescopes in Africa, Asia or Australia.
So:
- Why were not they included?
- Would it increase the diameter if they would include some from there? If so, again why did not they? (😉)
- Or, similarly asked: How can it be the diameter of the earth if only half-the-earth is included in the network?
Please try to explain it in a simple way first. I am no astronomer.
What I've noticed so far when skimming their official pages is that they write here:
As more telescopes are added to the EHT, we will be able to produce images of the emission around black holes. In general, the fidelity of images produced by an interferometric array increases as additional telescopes are added to the array.
This seems to support my question of why they did not use possibilities in Asia or so…
I guess, it would also make sense to have a more or less uniform distribution across the planet (or does not this matter?), that's why a "dot" in Africa might make sense too…
space-telescope radio-telescope
space-telescope radio-telescope
asked 1 hour ago
rugkrugk
1162
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
rugkrugk
1162
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
rugkrugk
1162
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
rugkrugk
1162
asked 1 hour ago
rugkrugk
1162
1162
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
rugk is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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Check out our Code of Conduct.
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1 Answer
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$begingroup$
Would it increase the diameter if they would include some from there?
No. Not by much, at least. The telescopes are already ~20,000 km apart, so you can't create a longer baseline that still has a simultaneous view of the target.
Don't forget: Earth is a sphere. Only one half of that sphere can observe M87 at the same time.
Telescopes in the Eastern hemisphere would enable more observations, but I don't know if that would bring any improvement over what they already had.
answered 1 hour ago
HobbesHobbes
96.3k2272426
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$begingroup$
Would it increase the diameter if they would include some from there?
No. Not by much, at least. The telescopes are already ~20,000 km apart, so you can't create a longer baseline that still has a simultaneous view of the target.
Don't forget: Earth is a sphere. Only one half of that sphere can observe M87 at the same time.
Telescopes in the Eastern hemisphere would enable more observations, but I don't know if that would bring any improvement over what they already had.
answered 1 hour ago
HobbesHobbes
96.3k2272426
$endgroup$
add a comment |
$begingroup$
Would it increase the diameter if they would include some from there?
No. Not by much, at least. The telescopes are already ~20,000 km apart, so you can't create a longer baseline that still has a simultaneous view of the target.
Don't forget: Earth is a sphere. Only one half of that sphere can observe M87 at the same time.
Telescopes in the Eastern hemisphere would enable more observations, but I don't know if that would bring any improvement over what they already had.
answered 1 hour ago
HobbesHobbes
96.3k2272426
$endgroup$
add a comment |
$begingroup$
Would it increase the diameter if they would include some from there?
No. Not by much, at least. The telescopes are already ~20,000 km apart, so you can't create a longer baseline that still has a simultaneous view of the target.
Don't forget: Earth is a sphere. Only one half of that sphere can observe M87 at the same time.
Telescopes in the Eastern hemisphere would enable more observations, but I don't know if that would bring any improvement over what they already had.
answered 1 hour ago
HobbesHobbes
96.3k2272426
$endgroup$
Would it increase the diameter if they would include some from there?
No. Not by much, at least. The telescopes are already ~20,000 km apart, so you can't create a longer baseline that still has a simultaneous view of the target.
Don't forget: Earth is a sphere. Only one half of that sphere can observe M87 at the same time.
Telescopes in the Eastern hemisphere would enable more observations, but I don't know if that would bring any improvement over what they already had.
answered 1 hour ago
HobbesHobbes
96.3k2272426
answered 1 hour ago
HobbesHobbes
96.3k2272426
answered 1 hour ago
HobbesHobbes
96.3k2272426
answered 1 hour ago
HobbesHobbes
96.3k2272426
96.3k2272426
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