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How can we see planets if they are so far away?
A few more have been detected by measuring the way a planet’s gravity distorts the light of a distant star — a method called gravitational microlensing. Scientists have directly imaged a few dozen exoplanets by blocking the glare of stars so they can see their planets’ fainter glow.
How long does it take light to reach us from other galaxies?
Other Galaxies
| Object | Time for the Light to Reach Us |
|---|---|
| Alpha Centauri (nearest star system) | 4.3 years |
| Sirius (brightest star in our sky) | 9 years |
| Betelgeuse (bright star) | 430 years |
| Orion Nebula | 1500 years |
Can we see planets in other galaxies?
An extragalactic planet, also known as an extragalactic exoplanet or an extroplanet, is a star-bound planet or rogue planet located outside of the Milky Way Galaxy. Due to the huge distances to such worlds, they would be very hard to detect directly.
Can we see planets from other galaxies with naked eye?
No, when we with our unaided eyes look into the night sky – especially from a dark site, a place far from city lights – we see stars that are part of our galaxy, the Milky Way. Our Sun is a star, but it is very bright because it is so close compared to other stars.
How does NASA know about other galaxies?
The most distant galaxies are caught up in the expansion of the Universe, causing distant galaxies to redshift past the point where our optical and near-infrared telescopes (like Hubble) could detect them.
Why can’t we see planets from other galaxies?
But when it comes to spotting these planets, there is a problem. Other galaxies are so far away and the stars crammed into such a small region of space, as seen from Earth, that it is hard to identify individual ones let alone the effects of any planets around them.
How long has light been traveling through the universe?
Imagine the Universe! Current observations suggest that the Universe is about 13.7 billion years old. We know that light takes time to travel, so that if we observe an object that is 13 billion light years away, then that light has been traveling towards us for 13 billion years.
What is the farthest galaxy yet detected?
Update 02/03/16: Here are the newest candidates (as of September and May 2015 respectively) for farthest galaxy yet detected. EGS8p7 at more than 13.2 billion light years away, and EGS-zs8-1 at 13.1 billion light years away.
What is the difference between the Milky Way galaxy and universe?
Most of the stars in our galaxy are thought to host their own families of planets. The Milky Way galaxy is just one of billion of galaxies in the universe, The universe is a vast expanse of space which contains all of everything in existence. The universe contains all of the galaxies, stars, and planets.