NASA has discovered a remarkable system of seven planets orbiting a star slightly bigger and hotter than the Sun. The star, called Kepler 385, lies around 5,000 light years away in the constellation Cygnus. It’s slightly hotter and bigger than the Sun. All the seven planets are larger than Earth but smaller than Neptune, and are bathed in more radiant heat from their host star, than any planet in our solar system. The reason why this discovery is so important is that Kepler-385 system is one of only a few known planetary systems to contain more than six verified planets. It is also one of the very few systems in which all of the planets are larger than Earth. It suggests that such systems may be more common than previously thought. Further study could help us to better understand the formation and evolution of planets.
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Our galaxy is positioned near the center of a massive cosmic void known as the KBC void or the Local Hole. This void, which stretches an incredible 2 billion light-years across, challenges some of the most basic ideas in cosmology. The existence of such a vast empty space raises big questions about the Big Bang, how galaxies are spread out, and the very nature of the universe’s expansion. However, the most intriguing part is that this void could help explain two of astronomy’s biggest puzzles: the Hubble Tension and the Fermi Paradox.
REFERENCE:
A simultaneous solution to the Hubble tension and observed bulk flow within 250 h−1 Mpc – Mazurenko et al. (Monthly Notices of the Royal Astronomical Society)– https://sou42.co/3AHnvt2
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💻 Created and Produced by: Rishabh Nakra
✍🏻 Written and Researched by: Shreejaya Karantha
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,1,The James Webb Space Telescope has made a record-breaking observation in deep space. The infrared observatory has given astronomers their first detailed glimpse of supernovae from when our universe was just a small fraction of its current age.
Within a patch of sky about the size of a rice grain held at arm's length, Webb has discovered at least 80 supernovae, increasing the number of known supernovae in the early universe by tenfold. Some of these newly found supernovae are the farthest we've ever seen, including ones that help us measure how fast the universe is expanding.
To discover supernovae, the team compared several images taken up to a year apart, searching for sources that either appeared or vanished. These objects, which change in brightness over time, are known as transients. Supernovae are a specific type of transient. The team spent over 100 hours of Webb's observing time on each image, and the results have opened a new window into the early universe.
📝 REFERENCES:
The JADES Transient Survey: Discovery and Classification of Supernovae in the JADES Deep Field, DeCoursey et al - https://bit.ly/3KXP96x
NASA Press Release - https://bit.ly/3z1ekm5
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💻 Created, Written, and Produced by: Rishabh Nakra
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,1,Astronomers have found the strongest statistical evidence of Planet 9, the hidden planet of our solar system believed to be lurking in the outskirts of the solar system. The possibility of the existence of Planet 9 has long intrigued scientists. Some researchers believe it might have been a rogue planet captured by our Sun's gravity, while others think it could have formed from the same disk of gas and dust as the other planets. If Planet 9 exists, it is believed to be ten times more massive than Earth and orbit the Sun at a distance of 400 to 800 Astronomical Units, which is 400 to 800 times the distance between the Earth and the Sun.
Astronomers have been eagerly hunting for clues, using powerful telescopes and advanced computer models to track its influence. After years of watching the sky, solving mathematical equations, and running complex computer simulations, they now have the strongest evidence yet that Planet 9 really exists. This discovery introduces an exciting plot twist in the story of the hidden planet.
📝 REFERENCES:
Generation of Low-Inclination, Neptune-Crossing TNOs by Planet Nine, Batygin et al (2024), The Astrophysical Journal - https://bit.ly/4c0A0gG
Evidence for a Distant Giant Planet in the Solar System, Batygin and Brown (2016), The Astrophysical Journal - https://bit.ly/4efIxOx
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,1,Astronomy Calendar 2024: In this video, you will find all the important astronomical events taking place in 2024: meteor showers, eclipses, comets, and planetary conjunctions. As it turns out, 2024 is going to be a great year for astronomy enthusiasts. It has four eclipses, two supermoons, and several planetary conjunctions.
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The James Webb Space Telescope has made history by discovering the earliest black hole known in the Universe. This infrared observatory found a massive black hole that existed when the Universe was only 470 million years old, roughly 3% of its current age. The discovery became even more intriguing when scientists measured the black hole's mass, which turned out to be 40 million times that of our Sun. This is ten times the mass of Sagittarius A* (A star), the supermassive black hole located at the center of our galaxy. This finding appears to have resolved one of the most significant mysteries in astronomy: the origin of the first black holes in the Universe.
But how did such a massive black hole form so quickly in the baby universe? What's so puzzling about the mass of this supermassive black hole lying at the edge of time? Finally, and most importantly, how does this discovery shed light on the birth of the first black holes in the cosmos?
The 79th episode of the Sunday Discovery Series answers all these questions.
RESEARCH PAPER:
Evidence for heavy seed origin of early supermassive black holes from a z~10 X-ray quasar, Bogdan et al.
https://arxiv.org/abs/2305.15458
Created By: Rishabh Nakra
Written By: Shreejaya Karantha
Narrated By: Jeffrey Smith
,1,NASA has discovered a remarkable system of seven planets orbiting a star slightly bigger and hotter than the Sun. The star, called Kepler 385, lies around 5,000 light years away in the constellation Cygnus. It’s slightly hotter and bigger than the Sun. All the seven planets are larger than Earth but smaller than Neptune, and are bathed in more radiant heat from their host star, than any planet in our solar system. The reason why this discovery is so important is that Kepler-385 system is one of only a few known planetary systems to contain more than six verified planets. It is also one of the very few systems in which all of the planets are larger than Earth. It suggests that such systems may be more common than previously thought. Further study could help us to better understand the formation and evolution of planets.
To get regular space updates, follow The Secrets of the Universe.
