Answers:
too oodles
none
The current count is anywhere from 124 to 140, depending on who’s counting, how and with what point of skepticism.
They are all immensely huge. The smallest (and most just now discovered) would be about the size of Neptune—which is going on for 60 times the size of Earth. Most are much larger than Jupiter, our solar system’s largest planet, which is about 1,300 times the size of Earth. Like both Neptune and Jupiter, the “known” extrasolar planets are plausible big balls of gas.
You wouldn’t know it from the impressively definitive language contained by astronomy textbooks and NASA and university pattern sites, but there is indeed room to argue the reality of any of these observations—at lowest possible, if they’re to be called “planets.”
Leaving aside the cross-examine of the possible photograph (and another similar image announced within May), none of the extrasolar planet “discoveries” involves direct observation.
At best, this is an art of interpreting “wobbles” and (most frequently and credibly) velocity shifts (sometimes also certain as “wobbles”) in the movements of stars, from which it is inferred that gravitational verbs from an orbiting planet is the effect. The size of the planet can be guessed from the movement.
Another mode is presuming a regular change contained by the beat of a pulsar—a star that emit bursts of energy a bit than just shimmering steadily—is due to the gravitational suction of a nearby planet. And still another is that the slight dimming of a star is due to a planet coming between it and us (a frequent “confirmation” method to other forms of detection).
The hottest method is optical interferometry, which in guess will allow planets to be literally, actually see (via infrared telescopy, usually) by using multiple images taken from diverse angles that cancel out the otherwise overwhelming grimace of the accompanying star. If planets are out there, anyhow. It can also include adding up spectrography that can determine chemical elemental makeup based on the hurricane lantern the object emit. (This led to the claimed discovery of a sodium-containing “atmosphere” on one “planet” within 2001.)
The Sept. 10 image of a possible planet around the star identified as 2M1207 be produced by that method by the European Southern Observatory.
The velocity-shift detection method kicked off the total discovery boom in the impulsive 1990s, and since then there’s essentially be an extrasolar planet discovered every month.
It’s an exciting field of inspection, but there are philosophical and practical reason for skepticism.
We’re talking something like very minute, indirect observations driven by a romantic quest to, as NASA’s pattern site baldly puts it, be able to read out we “have found another Earth.” There is a strong tea-leaf aspect to this.
And what is often departed out of discussions of this field is its history of wishful-thinking errors and suspicious notes. For example, as NASA again puts it, “many” of the observed planets “are bizarre,” displaying highly nonconformist orbits and a proximity to their stars that doesn’t square beside accepted planetary-creation opinion. Why such a high point of “bizarre” behavior? How about eyewitness error or wishful thinking? The individual explanations become very involved.
Even more curiously, it have been determined that our Sun in recent times so happens to enjoy no detectable wobble from all the planets around it—this one blamed on sunspots masking the electromagnetic detection of such a shimmy. Hmm.
It’s also worth note there is no agreement on what a “planet” is. You and I come up with of a ball orbit a star; but some observing astronomers adopt a definition that includes a body that is not contained by (stellar) orbit. They may be “failed stars,” if you will.
The earliest claimed extrasolar planet detection, in the belatedly 1960s, was almost of course bunk. It involved a supposed wobble of a star. Just about nobody else could detect any wobble. Instrument error and wishful thinking be likely culprits. The wobble method is not favored today.
Extrasolar excitement renewed within 1991 with a pulsar close watch that was following acknowledged to be a calculation error. This did not stop a 1992 watch that claimed to find three planets around another pulsar. The observation remains controversial. (It’s also worth note that pulsars are infamous for bizarre changes and fluctuations, and nobody have satisfactorily explained their disposition in the first place.)
Wisely moving to all the same another detection method, astronomers really kicked things into gear in 1995, beside a flood of velocity-shift observations. Many of these are considered quite convincing and will prove to be any a watershed or a scientific trend. Things have not agree to up since.
I am being hyper-skeptical here because somebody have to be. Astronomers certainly put individual observations to the fire within their journals, but the overall perception of the reality of these observations is once in a while questioned unequivocally and certainly not for public consumption; comparatively the opposite, surrounded by fact, as misleadingly positive statements are made by importantly respected sources.
The good report is that interferometry has the potential to provide direct metaphors of some types of extrasolar planets. That could really settle some matters.
On the other mitt, it may only lift more questions. Take the Sept. 10 picture, for example. The “planet” is pretty convincing as an symbol, but since that image is two-dimensional, there’s no instrument to tell the two objects’ actual relationship to respectively other, let alone if one is orbit the other. The “planet” could be light-years closer or farther away from us than the star is.
Bringing most or all of the close watch methods together may paint a convincing “yea” or “nay” picture of extrasolar planets. Or maybe it will transport interstellar space flight to determine the question for sure.
Carl Sagan said "at hand are billions and billions of stars in The Universe"
He also stated that within were more stars than adjectives of the grains of sand on adjectives of the beaches within the world.
I would have to assume that even if singular a fraction of these stars had planets within their system (and that would be a very conservative estimate) that within would have to be several billions of planets as well.
I regard this is a great question, but one that could never truely be answered by man.
Not certain yet :))
more the we think,
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too oodles
none
The current count is anywhere from 124 to 140, depending on who’s counting, how and with what point of skepticism.
They are all immensely huge. The smallest (and most just now discovered) would be about the size of Neptune—which is going on for 60 times the size of Earth. Most are much larger than Jupiter, our solar system’s largest planet, which is about 1,300 times the size of Earth. Like both Neptune and Jupiter, the “known” extrasolar planets are plausible big balls of gas.
You wouldn’t know it from the impressively definitive language contained by astronomy textbooks and NASA and university pattern sites, but there is indeed room to argue the reality of any of these observations—at lowest possible, if they’re to be called “planets.”
Leaving aside the cross-examine of the possible photograph (and another similar image announced within May), none of the extrasolar planet “discoveries” involves direct observation.
At best, this is an art of interpreting “wobbles” and (most frequently and credibly) velocity shifts (sometimes also certain as “wobbles”) in the movements of stars, from which it is inferred that gravitational verbs from an orbiting planet is the effect. The size of the planet can be guessed from the movement.
Another mode is presuming a regular change contained by the beat of a pulsar—a star that emit bursts of energy a bit than just shimmering steadily—is due to the gravitational suction of a nearby planet. And still another is that the slight dimming of a star is due to a planet coming between it and us (a frequent “confirmation” method to other forms of detection).
The hottest method is optical interferometry, which in guess will allow planets to be literally, actually see (via infrared telescopy, usually) by using multiple images taken from diverse angles that cancel out the otherwise overwhelming grimace of the accompanying star. If planets are out there, anyhow. It can also include adding up spectrography that can determine chemical elemental makeup based on the hurricane lantern the object emit. (This led to the claimed discovery of a sodium-containing “atmosphere” on one “planet” within 2001.)
The Sept. 10 image of a possible planet around the star identified as 2M1207 be produced by that method by the European Southern Observatory.
The velocity-shift detection method kicked off the total discovery boom in the impulsive 1990s, and since then there’s essentially be an extrasolar planet discovered every month.
It’s an exciting field of inspection, but there are philosophical and practical reason for skepticism.
We’re talking something like very minute, indirect observations driven by a romantic quest to, as NASA’s pattern site baldly puts it, be able to read out we “have found another Earth.” There is a strong tea-leaf aspect to this.
And what is often departed out of discussions of this field is its history of wishful-thinking errors and suspicious notes. For example, as NASA again puts it, “many” of the observed planets “are bizarre,” displaying highly nonconformist orbits and a proximity to their stars that doesn’t square beside accepted planetary-creation opinion. Why such a high point of “bizarre” behavior? How about eyewitness error or wishful thinking? The individual explanations become very involved.
Even more curiously, it have been determined that our Sun in recent times so happens to enjoy no detectable wobble from all the planets around it—this one blamed on sunspots masking the electromagnetic detection of such a shimmy. Hmm.
It’s also worth note there is no agreement on what a “planet” is. You and I come up with of a ball orbit a star; but some observing astronomers adopt a definition that includes a body that is not contained by (stellar) orbit. They may be “failed stars,” if you will.
The earliest claimed extrasolar planet detection, in the belatedly 1960s, was almost of course bunk. It involved a supposed wobble of a star. Just about nobody else could detect any wobble. Instrument error and wishful thinking be likely culprits. The wobble method is not favored today.
Extrasolar excitement renewed within 1991 with a pulsar close watch that was following acknowledged to be a calculation error. This did not stop a 1992 watch that claimed to find three planets around another pulsar. The observation remains controversial. (It’s also worth note that pulsars are infamous for bizarre changes and fluctuations, and nobody have satisfactorily explained their disposition in the first place.)
Wisely moving to all the same another detection method, astronomers really kicked things into gear in 1995, beside a flood of velocity-shift observations. Many of these are considered quite convincing and will prove to be any a watershed or a scientific trend. Things have not agree to up since.
I am being hyper-skeptical here because somebody have to be. Astronomers certainly put individual observations to the fire within their journals, but the overall perception of the reality of these observations is once in a while questioned unequivocally and certainly not for public consumption; comparatively the opposite, surrounded by fact, as misleadingly positive statements are made by importantly respected sources.
The good report is that interferometry has the potential to provide direct metaphors of some types of extrasolar planets. That could really settle some matters.
On the other mitt, it may only lift more questions. Take the Sept. 10 picture, for example. The “planet” is pretty convincing as an symbol, but since that image is two-dimensional, there’s no instrument to tell the two objects’ actual relationship to respectively other, let alone if one is orbit the other. The “planet” could be light-years closer or farther away from us than the star is.
Bringing most or all of the close watch methods together may paint a convincing “yea” or “nay” picture of extrasolar planets. Or maybe it will transport interstellar space flight to determine the question for sure.
Carl Sagan said "at hand are billions and billions of stars in The Universe"
He also stated that within were more stars than adjectives of the grains of sand on adjectives of the beaches within the world.
I would have to assume that even if singular a fraction of these stars had planets within their system (and that would be a very conservative estimate) that within would have to be several billions of planets as well.
I regard this is a great question, but one that could never truely be answered by man.
Not certain yet :))
more the we think,
Related Questions:
How do I do a science neutralby solar dash beside a thermoelectric generator? How would I ask the request for information?
For example, if I wanted to see how much waste energy from a house can be turned into usable electricity beside a thermoelectric generator, how would I do that? Or any more ideas? And how would I word...