Could we see a 50 billion light years away?

8. Could we see a galaxy that is 50 billion light-years away? -Yes, if we had a big enough telescope.

How many light-years is the Milky Way?

Our galaxy probably contains 100 to 400 billion stars, and is about 100,000 light-years across.

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How do we see light years away?

Because light takes time to travel to our eyes, everything we view in the night sky has already happened. In other words, when you observe something 1 light-year away, you see it as it appeared exactly one year ago. We see the Andromeda galaxy as it appeared 2.5 million years ago.

Why cant we see a galaxy that is 15 billion years old?

The Size of the Universe

The visible universe appears to have a radius of 15 billion light years simply because the universe is about 15 billion years old. The light from more distant objects simply has not had time to reach us.

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How long would it take to go 4.2 light-years?

Proxima Centauri is 4.2 light-years from Earth, a distance that would take about 6,300 years to travel using current technology. Such a trip would take many generations.

Is Dark Energy Dark?

First, it is dark, meaning that it is not in the form of stars and planets that we see. Observations show that there is far too little visible matter in the universe to make up the 27% required by the observations.

Do the stars we see still exist?

For the most part, the stars you see with the naked eye (that is, without a telescope) are still alive. These stars are usually no more than about 10,000 light years away, so the light we see left them about 10,000 years ago.

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If the Universe is 138 Billion Years Old How Can We See 46 Billion Lİght Years Away ?

Is there a dead galaxy?

These dead galaxies appear to remain dead even after 11 billion years, in the present-day universe. “We don’t really understand why they remain mostly dead after their initial burst of star-formation is halted,” Williams said.

Is the universe 7 trillion light-years?

They found that the universe is at least 250 times larger than the observable universe, or at least 7 trillion light-years across. “That’s big, but actually more tightly constrained that many other models,” according to 2011 MIT Technology Review (opens in new tab) report.

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How can we see 46 billion light years away?

The light that travels the longest gets stretched by the greatest amount, and the object that emitted that light is now at a greater distance because the universe is expanding. We can see objects up to 46.1 billion light-years away precisely because of the expanding universe.

What happens if we look 14 billion light years away?

We can currently see objects 46 billion light years away but we see them as they were in the distant past. We will never see the light from objects that are currently more than 15 billion light years away, because the universe is still expanding.

How fast speed of light is?

Light from a stationary source travels at 300,000 km/sec (186,000 miles/sec).

How can we see something more than 13 billion light years away?

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. Essentially, we are seeing that object as it appeared 13 billion years ago.

Why can’t we see a 15 billion year old galaxy?

Answer and Explanation: Because the universe is estimated to be less than 14 billion years old, conventional wisdom would indicate that we can’t see a galaxy 15 billion light-years away because, if anything exists 15 billion light-years away at all, its light hasn’t had enough time to reach us.

How can NASA look back in time?

Using its infrared-sensing instruments, the telescope can peer past dusty regions of space to study light that was emitted more than 13 billion years ago by the most ancient stars and galaxies in the universe.

How does NASA find planets light-years away?

While we cannot yet send spacecraft to planets beyond our solar system, scientists can study the light from exoplanets with telescopes. The telescopes they use to observe this light can be either in space, like the Hubble Space Telescope, or from the ground, like the Gemini Observatory telescopes.

How far can we see back in time?

We can see light from 13.8 billion years ago, although it is not star light – there were no stars then. The furthest light we can see is the cosmic microwave background (CMB), which is the light left over from the Big Bang, forming at just 380,000 years after our cosmic birth.

How can a star be 28 billion light-years away?

At that time it was 4 billion lightyears away from the proto-Milky Way, but during the almost 13 billion years it took the light to reach us, the Universe has expanded so that it is now a staggering 28 billion lightyears away.” The stars we see in the night sky all exist in our own Milky Way galaxy.

How old is the oldest galaxy?

SETTING NEW RECORDS, the James Webb Space Telescope has discovered the oldest known galaxy known to the universe and humankind. Caught and snapped in the cosmos, the GLASS-z13 galaxy was formed just 300 million years after the Big Bang, which struck 13.8 billion years ago.

Why can’t we see objects more than 46 billion light years away?

We don’t see stars and galaxies at a proper distance of 46 Gly, because this distance corresponds to a light travel time of 13.7 billion years, or very shortly after the big bang. When we look into the distance we also look back in time.

Does the galaxy go forever?

Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of some kind marking the end of space. But nobody knows for sure.

How can we see back 46 billion light-years when the age of the universe is only 13.8 billion years?

The light that travels the longest gets stretched by the greatest amount, and the object that emitted that light is now at a greater distance because the universe is expanding. We can see objects up to 46.1 billion light-years away precisely because of the expanding universe.

Are light-years quick?

So we speak of space objects in terms of light-years, the distance light travels in a year. Light is the fastest-moving stuff in our universe. It travels at 186,000 miles per second (300,000 km/sec). And thus a light-year is 5.88 trillion miles (9.46 trillion kilometers).

Can we see back in time?

As it takes a really long time for light to travel we can essentially look way back in time from when stars and planets were formed after the Big Bang. The light that reaches the James Webb space telescope may have traveled millions of miles from a star that no longer exists.

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