Is anybody out there? Where are all the alien civilizations? Even if (intelligent) life is very unlikely, the sheer size and age of the universe means that even long odds might have produced space faring civilizations. Yet, so far, nada. When people are considering the (im)probability of non-human space travellers, one thing always comes up: […]... Read more »
Frank A, & Sullivan WT 3rd. (2016) A New Empirical Constraint on the Prevalence of Technological Species in the Universe. Astrobiology. PMID: 27105054
Gravitational waves, detected by LIGO, might have implications for finding black holes.... Read more »
Abbott, B. (2016) Observation of Gravitational Waves from a Binary Black Hole Merger. Physical Review Letters, 116(6). DOI: 10.1103/PhysRevLett.116.061102
Emanuele Berti. (2016) Viewpoint: The First Sounds of Merging Black Holes. APS Physics 9 (2016) 17. arXiv: 1602.04476v2
Universe would end earlier than the anticipated time for the Sun to burn completely.
Scientific observation of the stars and galaxies in our universe are showing that the universe is continuously expanding, and the rate of this expansion is continuously increasing. After looking at this continuous expansion, one of the suggested possibilities for the future is that, the stars would die, everything in the universe will drift out, and t........ Read more »
Jose Beltran Jimenez, Ruth Lazkoz, Diego Saez-Gomez, & Vincenzo Salzano. (2016) Observational support for approaching cosmic doomsday. arXiv. arXiv: 1602.06211v1
According to a new model, Big Bang never happened and Universe existed forever without any beginning.
Physics Letters B
According to our present knowledge, Universe came into existence about 13.8 billion years ago. Before the existence of Universe, everything was in the form of a tiny point, which is also referred to as singularity. Therefore, it is assumed that everything in the Universe was present in that tiny point at that time. Then a........ Read more »
The detection of gravitational waves produced by the collision of two black holes over 1 billion light years away confirms Einstein's vision of our Universe.... Read more »
Abbott, B., Abbott, R., Abbott, T., Abernathy, M., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R.... (2016) Observation of Gravitational Waves from a Binary Black Hole Merger. Physical Review Letters, 116(6). DOI: 10.1103/PhysRevLett.116.061102
Earth is actually a combination of two planets, i.e. Earth and Theia, a planet thought to be about the size of Mars.
Researchers from University of California Los Angeles (UCLA) have recently reported that there was a “violent, head-on collision” of Earth and Theia, which is thought to be an ancient planet having the approximate size of Mars or according to some it was about Earth’s size, about 4.5 billion years ag........ Read more »
Young, E., Kohl, I., Warren, P., Rubie, D., Jacobson, S., & Morbidelli, A. (2016) Oxygen isotopic evidence for vigorous mixing during the Moon-forming giant impact. Science, 351(6272), 493-496. DOI: 10.1126/science.aad0525
Our Solar System has ninth planet in the outer spaces as evidenced by researchers.
The Astronomical Journal
Researchers have recently reported that they have found the best known evidence for the existence of ninth planet, referred to as Planet X or Planet Nine, at the outer limits of our Solar System. However, it has been noted that there are no direct evidences for the presence of ninth planet. Researchers have based their argument about ........ Read more »
Batygin, K., & Brown, M. (2016) EVIDENCE FOR A DISTANT GIANT PLANET IN THE SOLAR SYSTEM. The Astronomical Journal, 151(2), 22. DOI: 10.3847/0004-6256/151/2/22
Thanks to the Internet, amateur volunteers known as "citizen scientists" can readily donate their time and effort to science--in fields ranging from medicine to zoology to astrophysics. The astrophysics project Space Warps offers a compelling example of why citizen science has become such a popular tool and how valuable it can be.
... Read more »
Marshall, P., Verma, A., More, A., Davis, C., More, S., Kapadia, A., Parrish, M., Snyder, C., Wilcox, J., Baeten, E.... (2015) SPACE WARPS - I. Crowdsourcing the discovery of gravitational lenses. Monthly Notices of the Royal Astronomical Society, 455(2), 1171-1190. DOI: 10.1093/mnras/stv2009
More, A., Verma, A., Marshall, P., More, S., Baeten, E., Wilcox, J., Macmillan, C., Cornen, C., Kapadia, A., Parrish, M.... (2015) SPACE WARPS- II. New gravitational lens candidates from the CFHTLS discovered through citizen science. Monthly Notices of the Royal Astronomical Society, 455(2), 1191-1210. DOI: 10.1093/mnras/stv1965
In "Star Trek", a transporter can teleport a person from one location to a remote location without actually making the journey along the way. Such a transporter has fascinated many people. Quantum teleportation shares several features of the transporter and is one of the most important protocols in quantum information.... Read more »
Li, T., & Yin, Z. (2016) Quantum superposition, entanglement, and state teleportation of a microorganism on an electromechanical oscillator. Science Bulletin. DOI: 10.1007/s11434-015-0990-x
Using mathematical models, scientists have ‘looked’ into the interior of super-Earths and discovered that they may contain compounds that are forbidden by the classical rules of chemistry — these substances may increase the heat transfer rate and strengthen the magnetic field on these planets.... Read more »
Niu, H., Oganov, A., Chen, X., & Li, D. (2015) Prediction of novel stable compounds in the Mg-Si-O system under exoplanet pressures. Scientific Reports, 18347. DOI: 10.1038/srep18347
Today is the winter solstice, and the seventh anniversary of this blog. I’ve traditionally posted about archaeoastronomy on these anniversaries, so I’m going to briefly interrupt my series on Crucible of Pueblos to discuss an interesting article on the evidence for astronomical observations at Chaco Canyon. There turns out to be some overlap, actually, which […]... Read more »
Munro AM, & Malville JM. (2010) Calendrical Stations in Chaco Canyon. Archaeoastronomy, 91-106. info:/
Once upon a time, it was thought that black holes could ‘eat-up’ accreted matter. That is: gas, dust, and other such things that have been pulled into the black hole’s gravity field, usually forming a disk of rotating material. The black holes would pull the matter into infinity, with no limit to how large a black hole could become in this manner.... Read more »
Why send a message back in time, but lock it so that no one can ever read the contents? Because it may be the key to solving currently intractable problems. It turns out that an unopened message can be exceedingly useful. This is true if the experimenter entangles the message with some other system in the laboratory before sending it.... Read more »
Yuan, X., Assad, S., Thompson, J., Haw, J., Vedral, V., Ralph, T., Lam, P., Weedbrook, C., & Gu, M. (2015) Replicating the benefits of Deutschian closed timelike curves without breaking causality. npj Quantum Information, 15007. DOI: 10.1038/npjqi.2015.7
This is our home, that pale blue dot, dwarfed by an arrow that takes up less space on your screen than this sentence. For all our might and “overwhelming” intelligence, if we flexed our mental might and developed a weapon to destroy this pale blue dot, it would almost certainly go unnoticed in the universe.... Read more »
Carl Sagan. (2007) The Voyager 1 spacecraft image shows the earth as a pale blue dot against the black of deep space. Science Direct. DOI: 10.1016/B978-008044045-3/50001-3
Scientists at Washington State University and the University of Idaho are helping students figure out how to farm on Mars, much like astronaut Mark Watney, played by Matt Damon, attempts in the critically acclaimed movie “The Martian.” Washington State University physicist Michael Allen and University of Idaho food scientist Helen Joyner teamed up to explore the […]... Read more »
Helen S. Joyner et al. (2015) Farming In Space? Developing a Sustainable Food Supply on Mars. National Center for Case Study Teaching in Science. info:other/Link
"The Martian" movie opens soon! It's about an astronaut stranded on Mars who is trying to survive and find a way to get back home. But today, we humans here on Earth still have to think of clever ways to survive a trip to the red planet in the first place.... Read more »
Bamford, R., Kellett, B., Bradford, J., Todd, T., Benton, M., Stafford-Allen, R., Alves, E., Silva, L., Collingwood, C., Crawford, I.... (2014) An exploration of the effectiveness of artificial mini-magnetospheres as a potential solar storm shelter for long term human space missions. Acta Astronautica, 105(2), 385-394. DOI: 10.1016/j.actaastro.2014.10.012
Bamford, R., Gibson, K., Thornton, A., Bradford, J., Bingham, R., Gargate, L., Silva, L., Fonseca, R., Hapgood, M., Norberg, C.... (2008) The interaction of a flowing plasma with a dipole magnetic field: measurements and modelling of a diamagnetic cavity relevant to spacecraft protection. Plasma Physics and Controlled Fusion, 50(12), 124025. DOI: 10.1088/0741-3335/50/12/124025
Walsh, B., Foster, J., Erickson, P., & Sibeck, D. (2014) Simultaneous Ground- and Space-Based Observations of the Plasmaspheric Plume and Reconnection. Science, 343(6175), 1122-1125. DOI: 10.1126/science.1247212
OverviewIn an article from Geophysical Research Letters, a team led by Eugene Shaygin used images taken by the Venus Monitoring Camera (VMC) aboard Venus Express to identify transient hot spots on the surface. These hot spots are located near very young (~10 Mya) volcanoes and rifts, and are suggestive of active lava flows.Even though the surface is generally obscured from view by the thick clouds, there is a transparent window through which light can pass in the near infrared wavelengths, and t........ Read more »
Shalygin, E., Markiewicz, W., Basilevsky, A., Titov, D., Ignatiev, N., & Head, J. (2015) Active volcanism on Venus in the Ganiki Chasma rift zone. Geophysical Research Letters, 42(12), 4762-4769. DOI: 10.1002/2015GL064088
Campbell, B., Campbell, D., Morgan, G., Carter, L., Nolan, M., & Chandler, J. (2015) Evidence for crater ejecta on Venus tessera terrain from Earth-based radar images. Icarus, 123-130. DOI: 10.1016/j.icarus.2014.11.025
An improved model for vertical profiles of water and sulfuric acid vapors as well as sulfuric acid concentrations in the Venus clouds is presented. From the April 2015 edition of Icarus:Title:Vertical profiles of H2O, H2SO4, and sulfuric acid concentration at 45–75 km on VenusAbstract:A method developed by Krasnopolsky and Pollack (Krasnopolsky, V.A., Pollack, J.B. . Icarus 109, 58–78) to model vertical profiles of H2O and H2SO4 vapors and sulfuric acid concentration in the Venus cloud........ Read more »
Krasnopolsky, V. (2015) Vertical profiles of H2O, H2SO4, and sulfuric acid concentration at 45–75km on Venus. Icarus, 327-333. DOI: 10.1016/j.icarus.2015.01.024
Studies find airplane crews at high altitude are exposed to potentially harmful levels of radiation from cosmic rays. But could these cosmic rays pose hazards even at sea level? In recent years, research has suggested congenital birth defects down on Earth’s surface could be caused by these “solar particle events” — spikes in cosmic rays from the sun that touch off the northern lights and sometimes hamper communications or the electric power grid.... Read more »
Overholt, A., Melott, A., & Atri, D. (2015) A link between solar events and congenital malformations: Is ionizing radiation enough to explain it?. Journal of Geophysical Research: Space Physics, 120(3), 1537-1542. DOI: 10.1002/2014JA020681
I'm working through a lot of recent Venus-related papers, so here's another morsel for you that I will not have time to read in depth (I'm prioritizing articles relating to the Venusian surface). The author created a straightforward model of winds on Venus (using data from the VEGA Balloons and the Pioneer descent probes) to determine entry and descent dispersions for future Venus landers. From the April 2015 edition of Planetary and Space Science:Title:Touchdown on Venus: Analytic wind models ........ Read more »
Lorenz, R. (2015) Touchdown on Venus: Analytic wind models and a heuristic approach to estimating landing dispersions. Planetary and Space Science, 66-72. DOI: 10.1016/j.pss.2015.01.003
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