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Knowridge
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Image Credit: Knowridge
Asteroid Donaldjohanson: A space rock that could rewrite history
- New research suggests that the asteroid (52246) Donaldjohanson formed about 150 million years ago when a much larger asteroid broke apart.
- On April 20, 2025, NASA’s Lucy spacecraft will fly by Donaldjohanson to collect data that could provide new insights into how asteroids form and change.
- Donaldjohanson is part of the Erigone asteroid family and is expected to be elongated and rotate slowly.
- The Lucy mission aims to uncover the history of the solar system by visiting 11 asteroids over 12 years, primarily focusing on the Trojan asteroids near Jupiter.
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Knowridge
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Image Credit: Knowridge
We finally know the mass of brand new neutron stars
- A team of researchers analyzed a sample of 90 neutron stars in binary relationships to measure the birth mass function (BMF) of neutron stars.
- The BMF of neutron stars plays a crucial role in understanding their formation in supernova explosions.
- Previous observations provided loose constraints on neutron star masses, but new research offers a more accurate power-law description of the BMF.
- The study involved classifying neutron stars as recycled or non-recycled based on their rotational speeds in binary relationships.
- Probabilistic corrections were applied to infer the initial masses of neutron stars at the time of their formation.
- The developed power-law distribution (PLD) model indicates a unimodal distribution of neutron star masses, peaking at 1.27 solar masses.
- The research sheds light on the link between the neutron star BMF and the initial mass function (IMF) of massive stars.
- Understanding neutron star birth masses is vital for interpreting gravitational wave detections from neutron star mergers.
- The study provides insights into supernova explosions, double star evolution, and matter properties under extreme conditions.
- The research enhances astrophysicists' understanding of neutron star formation history and its implications for various astrophysical phenomena.
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Earthsky
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Image Credit: Earthsky
New data hints dark energy in the universe is evolving
- Scientists using the Dark Energy Spectroscopic Instrument (DESI) have found hints that dark energy in the universe changes over time.
- DESI helped create the largest 3D map of the universe, showing the influence of dark energy over the past 11 billion years.
- When combined with other measurements, there are indications that the impact of dark energy may be weakening over time, deviating from the standard cosmological model.
- The dataset from DESI, including data on 4 million stars, 13.1 million galaxies, and 1.6 million quasars, is now available to astronomers and the public.
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Guardian
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Image Credit: Guardian
Dark energy: mysterious cosmic force appears to be weakening, say scientists
- Dark energy, the mysterious force powering the expansion of the universe, appears to be weakening, according to a survey.
- Results from the dark energy spectroscopic instrument (Desi) team at the Kitt Peak National Observatory suggest that dark energy reached a peak billions of years ago and is now about 10% weaker.
- If confirmed, these findings could challenge the widely accepted theoretical model of the universe and potentially lead to a big crunch scenario, where the expansion of the universe goes into reverse.
- The results, based on the most detailed three-dimensional map of the universe created by Desi, indicate that dark energy is declining rather than remaining constant.
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Guardian
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Image Credit: Guardian
Is dark energy destined to dominate the universe and lead to the ‘big crunch’?
- Scientists have discovered that dark energy, a mysterious force acting as anti-gravity, is currently dominating the cosmic tug of war between matter and itself, driving the expansion of the universe.
- A recent analysis by the Dark Energy Spectroscopic Instrument (Desi) suggests that dark energy peaked when the universe was about 70% of its current age and is now on the decline.
- This challenges the widely accepted theoretical model that assumes dark energy to be constant and predicts a 'big freeze' scenario in which distant regions recede too fast, leading to an isolated universe.
- If dark energy were to decline beyond zero and become negative, it could reverse the expansion, resulting in a potential 'big crunch', or the universe could have a quieter ending if dark energy settled at zero.
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Medium
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Image Credit: Medium
Discover How to Earn from the Booming eLearning Sector
- The eLearning market offers enormous potential for creating a secondary income stream.
- The demand for educational resources is high, with over 300 million active learners.
- AI-powered technology makes it easy to enter the eLearning market and generate high-quality educational content.
- Leveraging platforms like Amazon's Kindle Direct Publishing and self-publishing options can help reach a wider audience and earn substantial royalties.
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Medium
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Image Credit: Medium
How I Built a $500 Daily Income with This Simple Tool
- The AMZ Money Machine is an innovative tool that helps users generate a daily income through Amazon Kindle publishing.
- Users have reported daily earnings of up to $547.93 and experienced an influx of $500 within a week of implementation.
- With no technical skills required, the AMZ Money Machine automates the process of finding and creating high-demand books.
- Lifetime access to the AMZ Money Machine is available for just $17, backed by a risk-free money-back guarantee.
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Mensjournal
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New Special Edition Megahit Omega MoonSwatch Is a Must-Have
- Omega and Swatch Group are celebrating the 60th anniversary of their collaboration with the launch of the Bioceramic MoonSwatch 1965.
- The commemorative timepiece is made from a blend of ceramic and biosourced material, paying tribute to the Omega Speedmaster's flight qualification from NASA.
- The watch features a gray case, black bezel, and special counters displaying numbers 19 and 65, with markers and hands that glow in the dark.
- The Omega x Swatch Bioceramic MoonSwatch 1965 is priced at $270 and available for purchase at selected Swatch stores worldwide, with a limit of one watch per person, per day, and per store.
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Nasa
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Image Credit: Nasa
New Bridge Ready to Serve NASA, America’s Space Interests
- The westbound portion of the NASA Causeway Bridge, which connects NASA Kennedy Space Center to the mainland, is now fully operational.
- The new bridge replaces the old two-lane drawbridge and is about 35% longer than its predecessor.
- With a 65-foot waterway clearance and a wider channel, the new bridge can accommodate larger vessels carrying cargo necessary for space launches.
- Funding for the bridge replacement and nearby road widening was provided by a $90 million federal infrastructure grant and contributions from NASA and the state of Florida.
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Livescience
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Image Credit: Livescience
'Rainbow on fire': Venus transforms into colorful crescent as it approaches its closest point to Earth
- New photos reveal Venus transformed into a colorful crescent as it approaches its closest point to Earth.
- On March 23, Venus will reach its inferior conjunction when it lies directly between Earth and the sun.
- Particles in Earth's atmosphere refract different wavelengths of light, creating a rainbow-like effect on Venus.
- Venus became unusually bright and was part of a rare planetary parade in the night sky in recent weeks.
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Livescience
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Image Credit: Livescience
NASA reveals a sunset on the moon in high definition for the 1st time
- NASA has released the first ever high-definition photographs of a sunset on the moon.
- The images were captured by the Blue Ghost lunar lander, which completed its maiden mission on the moon.
- The mission lasted for 14 days and collected extensive data on space weather and cosmic forces.
- The lander delivered 10 scientific and technological instruments to the moon's Mare Crisium basin.
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Nasa
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Image Credit: Nasa
Welcome Home, Crew-9!
- NASA astronauts Butch Wilmore, Nick Hague, and Suni Williams, along with Roscosmos cosmonaut Aleksandr Gorbunov, have returned from a long-duration science expedition aboard the International Space Station.
- During their mission, Crew-9 contributed to a variety of scientific experiments and technology demonstrations, conducting over 150 unique investigations with more than 900 hours of research.
- Suni Williams now holds the record for the most spacewalking time by a female astronaut, with 62 hours and 6 minutes outside the station.
- The research included studies on plant growth, stem cell technology for blood diseases, autoimmune disorders, and cancers.
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Earthsky
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Image Credit: Earthsky
New Euclid images reveal hidden gravitational lenses
- Euclid space telescope released its first batch of survey data, revealing 26 million galaxies and about 500 gravitational lens candidates.
- The mission aims to study dark matter and dark energy by surveying the night sky.
- The data release includes galaxy clusters, active galactic nuclei, quasars, and transient events.
- Euclid will observe each deep field multiple times during its six-year mission, promising many more discoveries.
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Livescience
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Image Credit: Livescience
4 tiny, Earth-like planets found circling 2nd-closest star system to us — and could be visited by future human generations
- A new study has revealed four Earth-like planets orbiting Barnard's Star, making them potentially visitable by future generations using advanced rocket propulsion.
- These planets are rocky and close to their star, making them unlikely to support life due to their high temperatures.
- Initially, astronomers suspected a gas giant orbiting Barnard's Star due to its wobbling motion, but the study found four smaller rocky planets causing the gravitational pull instead.
- The planets are so close to Barnard's Star that they complete orbits in a matter of days, ruling out their habitability.
- Future advancements in rocket propulsion, like nuclear fusion engines or light sails, could enable humans to reach and colonize these planets in the future.
- The discovery was made using the MAROON-X instrument on the Gemini North telescope and confirmed by data from ESPRESSO on the Very Large Telescope.
- The findings challenge previous assumptions and indicate the potential abundance of small rocky planets around red dwarfs like Barnard's Star.
- Despite being uninhabitable, the discovery of these nearby worlds marks a significant step in our understanding of planetary systems in our cosmic neighborhood.
- The researchers expressed excitement about the discovery and the sense of eternal knowledge it brings to humanity.
- The study sheds light on the commonality of rocky planets around red dwarfs and the possibility of further exploration beyond our solar system.
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