प्रॉक्सिमा सेन्टॉरी बी (Proxima Centauri b), जिसे केवल प्रॉक्सिमा बी (Proxima Centauri b) भी कहते हैं, प्रॉक्सिमा सेन्टॉरी नामक लाल बौनेतारे के वासयोग्य क्षेत्र में उस तारे की परिक्रमा करता हुआ एक ग़ैर-सौरीय ग्रह (यानि बहिर्ग्रह) है। हमारे सौर मंडल से लगभग ४.२ प्रकाशवर्ष (यानि एक ट्रिलियन या दस खरब किलोमीटर) दूर स्थित प्रॉक्सिमा सेन्टॉरी तारा सूरज के बाद पृथ्वी का सबसे समीपी तारा है और मित्र तारे (उर्फ़ अल्फ़ा सेन्टॉरी, Alpha Centauri) के त्रितारा मंडल में से एक है और हमारे अपने सौर मंडल के बाद सबसे समीपी ग्रहीय मंडलहै। पृथ्वी में ऊपर देखने पर मित्र तारा आकाश के नरतुरंग तारामंडल क्षेत्र में दिखता है। प्रॉक्सिमा बी ग्रह मिलने यूरोपीय दक्षिणी वेधशाला ने अगस्त २०१६ में की थी।

Proxima Centauri b (or Proxima b),sometimes referred to as Alpha Centauri Cb, is an exoplanet orbiting within the habitable zone of the red dwarf star Proxima Centauri, which is the closest star to the Sunand part of the larger triple star systemAlpha Centauri. It is about 4.2 light-years (1.3 parsecs) from Earth in the constellation Centaurus, making it and Proxima d, along with the currently disputed Proxima c, the closest known exoplanets to the Solar System.

How long is a day on Proxima b?

Earth rotates on its axis once every 24 hours. Proxima B is likely to be tidally locked, and therefore does not have a day/night cycle like earth. Instead one side of the planet is always in daylight and the other side is always in darkness.

Does Proxima b have water?

Because of its Earth-like mass, scientists believe that, not only could liquid water exist on Proxima b, it could also be a rocky, terrestrial planet similar to Earth. But Proxima b orbits around a star that, while close to our solar system, is also much dimmer, and much less massive than our sun

Can we live on Proxima Centauri b?

The stability of an atmosphere is a major issue for the habitability of Proxima Centauri b: Strong irradiation by UV radiation and X-rays from Proxima Centauri constitutes a challenge to habitability. Proxima Centauri b receives about 10–60 times as much of this radiation especially X-rays, as Earth

How long would it take humans to get to Proxima Centauri b?

So far, the fastest spaceship we have ever built is the New Horizons Probe and it’s going along at 58,000 kilometers per hour. At that speed, it would take roughly 80,000 years to get to Proxima Centauri b

Does Proxima b have gravity?

With that density, Proxima b’s surface gravity would be 0.866 gees or 8.50 meters per second squared, making life a bit easier for colonists because they would weigh 14% less than on Earth

Does Proxima Centauri b have a moon?

The hypothetical moon is similar in size and mass to the Earth’s Moon and orbits the planet at a similar distance. As the planet has more mass than Earth, the moon orbits it in 575.3 hours. As I have show, it is very improbable for Proxima Centauri b to have such a moon.

Does Proxima Centauri have oxygen?

The presence of oxygen is essential for the existence of life as we know it, and the fact that the levels of oxygen on Proxima B are similar to those found on Earth suggests that there could be similar forms of life present on the planet

Is Proxima Centauri b in the Milky Way?

All of these nearby stars – Proxima, Alpha Centauri A and B, and our sun – orbit together around the center of our Milky Way galaxy

Does Proxima b have liquid water?

The exoplanet is at a distance from its star that allows temperatures mild enough for liquid water to pool on its surface. This artist’s impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the solar system

What 2 planets are in Proxima Centauri?

Proxima Centauri has two known exoplanets and one candidate exoplanet: Proxima Centauri b, Proxima Centauri d and the disputed Proxima Centauri c. Proxima Centauri b orbits the star at a distance of roughly 0.05 AU (7.5 million km) with an orbital period of approximately 11.2 Earth days.

Does Proxima Centauri b spin?

We also show that Proxima b’s obliquity is likely null and its spin is either synchronous or in a 3:2 spin-orbit resonance, depending on the planet’s eccentricity and level of triaxiality.

Who discovered Proxima b?

Dr Guillem Anglada-Escudé

In 2016, researchers at Queen Marydiscovered an exoplanet, Proxima b, orbiting our nearest star, Proxima Centauri

Proxima b like Earth?

Proxima Centauri b is a super Earth exoplanet that orbits an M-type star. Its mass is 1.07 Earths, it takes 11.2 days to complete one orbit of its star, and is 0.04856 AU from its star. Its discovery was announced in 2016

we have images of Proxima b?

As of 2021, Proxima Centauri b has not yet been directly imaged, as its separation from Proxima Centauri is too small. It is unlikely to transit Proxima Centauri from Earth’s perspective; all surveys have failed to find evidence for any transits of Proxima Centauri b.

Can Hubble see Proxima b?

Summary. Proxima Centauri lies in the constellation of Centaurus (the Centaur), just over four light-years from Earth. Although it looks bright through the eye of the Hubble Space Telescope, as you might expect from the nearest star to the solar system, Proxima Centauri is not visible to the naked eye

Will humans ever reach Proxima b?

By their estimates, this mission concept could be ready for development around midcentury and could reach Proxima Centauri and its Earth-like exoplanet (Proxima b) by the third quarter of this century (2075 or after

Proxima Centauri had become a target for exoplanet searches already before the discovery of Proxima Centauri b, but initial studies in 2008 and 2009 ruled out the existence of larger-than-Earth exoplanets in the habitable zone. Planets are very common around dwarf stars, with on average 1–2 planets per star, and about 20–40% of all red dwarfs have one in the habitable zone. Additionally, red dwarfs are by far the most common type of stars.

Before 2016, observations with instruments at the European Southern Observatory in Chile had identified anomalies in Proxima Centauri which could not be satisfactorily explained by flares or chromospheric activity of the star. This suggested that Proxima Centauri may be orbited by a planet. In January 2016, a team of astronomers launched the Pale Red Dot project to confirm this hypothetical planet’s existence. On 24 August 2016, the team led by Anglada-Escudé proposed that a terrestrial exoplanet in the habitable zoneof Proxima Centauri could explain these anomalies and announced Proxima Centauri b’s discovery. In 2022, another planet named Proxima Centauri d, which orbits even closer to the star, was confirmed. Another planet candidate named Proxima Centauri cwas reported in 2020, but its existence has since been disputed, while the claimed existence of a dust belt around Proxima Centauri remains unconfirmed

We may not be alone

Earth is the only planet we know of that harbors life, but it may not be alone in the universe. Scientists have discovered thousands of exoplanets, or planets orbiting other stars, and some of them are remarkably similar to our home world. These exoplanets are of great interest to astronomers and astrobiologists, who hope to find signs of life beyond our solar system. Here are seven exoplanets that are just like Earth, in terms of their size, composition, temperature, and habitability

Proxima Centauri b

Proxima Centauri b, the nearest exoplanet to Earth at a mere 4.2 light-years away, boasts intriguing characteristics. Approximately 1.3 times the size of Earth, it orbits a red dwarf star, the most ubiquitous type in the galaxy. Despite completing an orbit in just 11 days, its cooler, dimmer star affords it a comparable energy intake to Earth. Positioned within the habitable zone, the potential for liquid water exists, albeit challenged by radiation, flares, and potential tidal locking

Will we ever be able to explore exoplanets?

The prospect of exploring exoplanets is a captivating subject that blends the boundaries of science fiction with scientific possibility. With advancements in space technology, particularly the deployment of NASA’s James Webb Space Telescope, we are now able to observe exoplanets in wavelengths never seen before, gaining unprecedented insights into their atmospheres and compositions. While current technology allows us to study these distant worlds from afar, the idea of human exploration or colonization of exoplanets faces significant challenges due to the vast distances involved. Hypothetical scenarios suggest that reaching even the nearest habitable exoplanets could take centuries, requiring multi-generational spaceships and technological advancements beyond our current capabilities. However, the relentless pace of scientific discovery and innovation gives hope that one day, perhaps in a future far beyond our current horizon, humanity may find ways to traverse these immense distances and set foot on exoplanets. Until then, our exploration remains bound to robotic missions and telescopes, peering across the cosmos to unravel the mysteries of these alien worlds.

Is there a possibility of life on these exoplanets?

The quest to discover life on exoplanets is one of the most thrilling endeavors in modern astronomy. With thousands of exoplanets discovered, many within their star’s habitable zone, the potential for life-sustaining conditions exists. While the exact odds remain uncertain, advancements in technology aim to detect atmospheric bio-signatures that could indicate life. The Drake equation, although speculative, suggests that life could be abundant in the cosmos. However, despite extensive searches, we have yet to find definitive evidence of life beyond Earth. The search continues, with scientists examining exoplanet atmospheres and surfaces for signs of life, holding onto the hope that we may not be alone in the universe.

Proxima Centauri is cooler than the Sun
For this reason the existence of any life is not possible. Researchers say that Proxima b is likely to fall within this range. Proxima Centauri is the nearest star to Earth. It’s cooler than the sun. Therefore, the area where life is possible is very close to its surface. Of the 100 billion stars in our galaxy, the Milky Way, 85% are Red Dwarfs while only 7% are Sun-like stars.

If life exists on Proxima Centauri B, what would they look like?

It is currently not possible to determine what life on Proxima Centauri b would look like as no evidence of life has been found on the exoplanet. Until further data and evidence is gathered, all speculation about the appearance of potential life on Proxima Centauri b remains purely speculative. However, if life does exist on Proxima Centauri b, it is likely to be vastly different from any life forms known on Earth, as it would have evolved under different conditions and in a different environment

We can have no idea and anyones guess is a good as any other we are aware of the vast range of features all living things demonstrate on earth from the very smallest single celled up to the very largest plants and animals.

Life has evolved to suit the Earth’s conditions if the conditions notably gravity and atmospheric density and waster prevalence were different some features would be different but basic concepts would be similar

Proxima b: Obstacles and Opportunities

If we could travel at the speed of light, which is approximately 299,792 kilometers per second, it would take around 4.24 years to reach Proxima Centauri, the closest star to our solar system. 

Here’s the breakdown: 

• Distance to Proxima Centauri: 4.24 light-years 
• Speed of light: 299,792 kilometers per second 
• Time to reach Proxima Centauri: Distance / Speed = 4.24 light-years / 1 light-year per year = 4.24 years 

However, it’s important to remember that travelling at the speed of light is currently impossible for any object with mass. As an object approaches the speed of light, its mass increases infinitely, requiring an infinite amount of energy to propel it further. 

Therefore, while the theoretical travel time to Proxima Centauri at the speed of light is 4.24 years, achieving such speeds is beyond our current technological capabilities. 

Here’s a comparison of the travel time to Proxima Centauri with different speeds: 

• Speed of light: 4.24 years 
• Parker Solar Probe (fastest human-made object): 7,230 years 
• Space shuttle Discovery: 148,000 years 

As you can see, even our fastest spacecraft are incredibly slow compared to the speed of light. Reaching Proxima Centauri within a human lifetime will likely require significant advancements in propulsion technology.

Traveling to Proxima Centauri Using Time Dilation

There is an Earth-like planet in our neighborhood, located just 4 light years away. It orbits in the habitable zone around our closest star, the red dwarf Proxima Centauri. How much time would it take us to travel there using today’s and future technologies?

Playing with numbers in Drake’s Equation has showed us that intelligent life forms may be few and far between. The nearest civilization may be thousands of light years away — if we are lucky. Finding a candidate among our closest neighbors must be considered extremely unlikely. But a planet may be suitable for hosting life without ever developing intelligent species like ourselves. An exoplanet like Proxima Centauri b may be the perfect destination to introduce interstellar travel.

Acceleration phase

The acceleration phase could be used to provide artificial gravity for space travelers in case of a manned mission. An acceleration of 1g would correspond to the gravity here on Earth. Leaving aside the top speed of the space ship an acceleration of 1g would give the following numbers:

Tomorrow’s technology

Tests are underway on a rocket technology that could shorten the time it takes to get to Mars. The rocket was designed to fly with an engine that uses nuclear reactors to heat plasma to two million degrees, giving a maximum speed of 54 km/s. The driving force behind the project is to reduce the time in space for astronauts going to Mars. But still, travelling to our nearest star would take over 20 000 years.

Distant future technologies

Lets’s look into the distant future and with some wild concepts in mind, such as the Helical engine, proposed in 2019 by NASA scientist Dr. David Burns. In theory this concept could travel at 99% the speed of light, at which relativistic time dilation would become more noticeable, thus making time pass at a slower rate for the travelers as perceived by an outside observer. For an observer at Earth, the travel to Proxima Centauri would take just over 4 years but onboard the ship it would only take some 7 months to travel the same distance. Including 2 years of acceleration and deceleration, and considering the distance traveled during this phase, you would end up with roughly 2,5 years of travel time onboard the ship. This corresponds to 6 years on Earth

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