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Because they're extremely far away, and they're almost impossible to see visually because the star itself blocks out any light reflected by those planets. However, it is possible to detect them. One simple way is by seeing how the star's light diminishes when one or more of those planets pass in front of them. Or, if their orbits aren't lined up right for us to observe this, we can detect the subtle gravitational "wobble" caused by the presence of those planets. It's a difficult and time-consuming process, but it has paid off - we now know of hundreds of these "exo-planets."
Such planets:* Are very faint, i.e., they emit very little light.
* Are outshone by the stars they orbit, which are very close (in angular distance) to the planets.
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What is the difference between planets and exoplanets?
Extra solar (or Exo) planets are planets that do not orbit the Sun. Planets in our solar system orbit the Sun.
What planet do most known extra-solar planets most resemble?
neptune
What are some ways that scientists are currently learning more about the solar system?
Scientists are learning more about the solar system through missions like the Mars Rover exploration, the Juno mission to Jupiter, and the New Horizons mission to Pluto. They also use telescopes both on Earth and in space, along with computer simulations and models, to study the planets, moons, asteroids, and comets in our solar system. Data collected from these various sources helps scientists understand the composition, structure, and evolution of our solar system.
What was surprising about the extrasolar planets that were discovered?
The surprising thing to me is how MANY extra-solar planets have been discovered. Considering the limitations of the Kepler Space Telescope's design, this indicates that there may be planets around a majority of the stars.
Does inner planets orbit the sun?
If you are talking about Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, these planets all orbit the Sun.It wasn't very long ago that these were the only planets we knew about. But with the development of enormously powerful space telescopes and newer more powerful computers, scientists have now discovered over 300 "extra-solar planets"; planets that orbit other stars. We've discovered so many, so quickly, than we now need to revise our theories on how planets form. We used to think that planets would be rare; now, it looks like a majority of mid-sized stars will have planets.
Why do astronomers find it difficult to locate extrasolar planets with telescopos?
extra solar planets are not bright compared to the stars they orbit
Extra solar planets are planets that?
Extra solar planets are planets that is outside of our solar system.
What do astronomers think about the possibility of planets orbiting other stars and being detected?
Astronomers believe that planets orbiting other stars, known as exoplanets, are common in the universe. They have been detected using various methods such as the transit method and radial velocity method. The discovery of exoplanets has greatly expanded our understanding of planetary systems beyond our own.
Has the Hubble telescope ever find an earth-like planet in 1 of the scales of the Pisces constallation?
No Earth-like planets have been discovered yet, but our best telescopes are (so far!) incapable of locating any extra-solar planets that small. With the launch of the James Webb Space Telescope, this may change.
What is the difference between planets and exoplanets?
Extra solar (or Exo) planets are planets that do not orbit the Sun. Planets in our solar system orbit the Sun.
Why are astronomers interested in detecting the presence of CO2 and O2 in the atmosphere of extra solar planets?
I'm not sure that carbon dioxide is very useful, but oxygen certainly is. Oxygen would strongly indicate the presence of life! I mean a significant amount of oxygen, of course.
How many planets in our solar system?
Eight
What is the latest count on the number of extra-solar planets?
Fomalhault
Are there planets in spiral galaxy?
yes, for example us and the rest of the planets in the solar system. to date there are also approx 400 extra solar planets discovered (planets beyond our solar system)
Are aliens died?
extra terestrial is life on other planets.. so no
The extra matter at the center of the solar nebula became the?
Inner planets
How have astronomers been searching for evidence of extra terrestrial intelligence?
They have been searching for evidence using a complex sound system to listen for radio waves from extra terrestrial intelligence.
