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Comet or asteroid: What killed the dinosaurs and where did it come from?

Credit: Credit not required. This is a public domain image.
It forever changed history when it crashed into Earth about 66 million years ago.
The Chicxulub impactor, as it s known, left behind a crater off the coast of Mexico that spans 93 miles and runs 12 miles deep. Its devastating impact brought the reign of the dinosaurs to an abrupt and calamitous end by triggering their sudden mass extinction, along with the end of almost three-quarters of the plant and animal species living on Earth.
The enduring puzzle: Where did the asteroid or comet originate, and how did it come to strike Earth? Now, a pair of researchers at the Center for Astrophysics | Harvard & Smithsonian believe they have the answer. ....

South Africa , Free State , Avi Loeb , Amir Siraj , Harvard Smithsonian , Harvard University , Harvard Origins Of Life Initiative , Breakthrough Prize Foundation , Scientific Reports , New England Conservatory , Vera Rubin Observatory , Harvard Origins , Life Initiative , Breakthrough Prize , Earth Science , Mathematics Statistics , Calculations Problem Solving , Space Planetary Science , Comets Asteroids , இலவசம் நிலை , ஆவி லோப் , அமீர் சிராஜ் , ஹார்வர்ட் ஸ்மித்சோனியன் , ஹார்வர்ட் பல்கலைக்கழகம் , ஹார்வர்ட் ஆரிஜிந்ஸ் ஆஃப் வாழ்க்கை முயற்சி , திருப்புமுனை ப்ரைஸ் அடித்தளம் ,

A tiny crystal device could boost gravitational wave detectors to reveal the birth cries of black holes

In 2017, astronomers witnessed the birth of a black hole for the first time. Gravitational wave detectors picked up the ripples in spacetime caused by two neutron stars colliding to form the black hole, and other telescopes then observed the resulting explosion.
But the real nitty-gritty of how the black hole formed, the movements of matter in the instants before it was sealed away inside the black hole’s event horizon, went unobserved. That’s because the gravitational waves thrown off in these final moments had such a high frequency that our current detectors can’t pick them up.
If you could observe ordinary matter as it turns into a black hole, you would be seeing something similar to the Big Bang played backwards. The scientists who design gravitational wave detectors have been hard at work to figure out how improve our detectors to make it possible. ....

United States , Albert Einstein , Carl Knox Ozgrav Swinburne University Author , Niels Bohr Institute , Communications Physics , Australian Centre Of Excellence , Big Bang , Carl Knox , Swinburne University , Australian Centre , Engineered Quantum Systems , Black Holes , Gravitational Waves , Neutron Stars , Quantum Mechanics , ஒன்றுபட்டது மாநிலங்களில் , ஆல்பர்ட் ஐன்ஸ்டீன் , நியீல்ஸ் போஹ்ர் நிறுவனம் , தகவல்தொடர்புகள் இயற்பியல் , ஆஸ்திரேலிய மையம் ஆஃப் சிறப்பானது , பெரியது இடி , கார்ல் நாக்ஸ் , ஸ்வின்பர்ன் பல்கலைக்கழகம் , ஆஸ்திரேலிய மையம் , பொறியியலாளர் குவாண்டம் அமைப்புகள் , கருப்பு துளைகள் ,

Young planets with teenage sun give space studies a lift

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IMAGE: The newly discovered TOI 451 planetary system features three planets orbiting the same sun.
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Credit: Illustration courtesy of NASA/Goddard Space Flight Center
HANOVER, N.H. - February 12, 2021 - A newly discovered planetary system will provide researchers with the rare chance to study a group of growing planets, according to research co-led by Dartmouth.
The new system, named TOI 451, is made up of at least three neighboring planets that orbit the same sun. The planets range in size between that of Earth and Neptune.
According to the research team, NASA s Hubble Space Telescope and its planned successor, the James Webb Space Telescope, can be used to study the atmosphere of each planet. Such research could lead to information on how planetary systems like our own solar system evolve. ....

Elisabeth Newton , Andrew Mann , University Of North Carolina At Chapel Hill , European Space Agency Gaia , Exoplanet Survey Satellite , Space Telescope , James Webb Space Telescope , Astronomical Journal , Southern African Large Telescope , North Carolina , Chapel Hill , European Space Agency , Space Planetary Science , Planets Moons , Comets Asteroids , Satellite Missions Shuttles , Experiments In Space , Stars The Sun , எலிசபெத் நியூட்டன் , ஆண்ட்ரூ மான் , பல்கலைக்கழகம் ஆஃப் வடக்கு கரோலினா இல் தேவாலயம் மலை , இடம் தொலைநோக்கி , ஜேம்ஸ் வலை இடம் தொலைநோக்கி , வானியல் இதழ் , வடக்கு கரோலினா , தேவாலயம் மலை ,

Astronomers discover concentration of small black holes in cluster NGC 639

Read more about Astronomers discover concentration of small black holes in cluster NGC 639 on Business Standard. The researchers used previous estimates of the stars tiny proper motions (their apparent motions on the sky), which allow for determining their true velocities within the cluster ....

France General , Gary Mamon , Eduardo Vitral , Paris Institute Of Astrophysics , European Space Agency Gaia , Paris Institute , Hubble Space Telescope , European Space Agency , Black Holes , பிரான்ஸ் ஜநரல் , கேரி மாமன் , எட்வார்டொ விட்ரல் , பாரிஸ் நிறுவனம் ஆஃப் வானியற்பியல் , பாரிஸ் நிறுவனம் , ஹப்பிள் இடம் தொலைநோக்கி , கருப்பு துளைகள் ,