8 posts · 5,459 views
News and astronomical events
Olga Vovk
8 posts
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- March 15, 2013
- 03:20 PM
- 148 views
Passive Radio Ice Depth Experiment
by Olga Vovk in Milchstraße
I would like to discuss one method used for estimate thickness of Antarctic ice, which could be easily adopted for space exploration and could be used to estimate the thickness of ice mantle on extraterrestrial planets, on Ceres and other bodies in the main asteroid belt, and on Jovian moons.... Read more »
Miller, T., Schaefer, R., & Brian Sequeira, H. (2012) PRIDE (Passive Radio [frequency] Ice Depth Experiment): An instrument to passively measure ice depth from a Europan orbiter using neutrinos. Icarus, 220(2), 877-888. DOI: 10.1016/j.icarus.2012.05.028
- May 25, 2012
- 03:14 PM
- 659 views
Once upon a time there was a star
by Olga Vovk in Milchstraße
Once upon a time there was a star. It was big, hot, luminous, and very proud of itself. It was the First Star. It had already devoured all the gas around, so no other stars could be born nearby. No neighbor stars were visible in vicinity either. It was lonely. The First Star spent its life in grief burning H and He and died shortly in pair-instability supernova. Or maybe it died quietly in a black hole. Or maybe I should tell another story. . .
Why do we think that Population III stars exist?........ Read more »
ResearchBlogging.org, & Bromm V. and Larson R. (2009) The First Stars in the Universe . Scientific American. info:/
Bromm, V. (2010) The Very First Stars: Formation and Reionization of the Universe. Proceedings of the International Astronomical Union, 5(S265), 27. DOI: 10.1017/S1743921310000116
Stacy, A., Greif, T., & Bromm, V. (2010) The first stars: formation of binaries and small multiple systems. Monthly Notices of the Royal Astronomical Society, 403(1), 45-60. DOI: 10.1111/j.1365-2966.2009.16113.x
- March 13, 2012
- 02:00 PM
- 680 views
On March 15, 5 suborbital sounding rockets are scheduled to launch from the NASA Wallops Facility, VA
by Olga Vovk in Milchstraße
This is part of a study of the upper level jet stream located in the mesosphere.
These five rockets will release an aluminum based chemical into the upper layers of atmosphere (the mesosphere) that will form milky-white clouds that will trace winds in space. These clouds might be visible for public up to 20 minutes by East coast residents from southern parts of New Hampshire and Vermont till South Carolina.... Read more »
Larsen, M. F., and C. G. Fesen. (2009) Accuracy issues of the existing thermospheric wind models: Can we rely on them in seeking solutions to wind-driven problems?. Ann. Geophys., 27, 2277–2284. info:/
- February 21, 2012
- 02:44 PM
- 1,004 views
Drilling Lake Vostok
by Olga Vovk in Milchstraße
On February 5th, 2012, the Russian team has finally managed to penetrate through almost 4000 m (3,768 m) of Antarctica’s ice and reach the surface of lake Vostok.... Read more »
Bulat, S., Alekhina, I., Marie, D., Martins, J., & Petit, J. (2011) Searching for life in extreme environments relevant to Jovian’s Europa: Lessons from subglacial ice studies at Lake Vostok (East Antarctica). Advances in Space Research, 48(4), 697-701. DOI: 10.1016/j.asr.2010.11.024
Vasiliev, N., Talalay, P., & , . (2011) Twenty Years of Drilling the Deepest Hole in Ice. Scientific Drilling. DOI: 10.2204/iodp.sd.11.05.2011
- November 30, 2011
- 02:31 PM
- 916 views
The biggest Mars mission launched
by Olga Vovk in Milchstraße
On Nov. 26, 2011 at 10:02 AM EST the Mars Science Laboratory (MSL) launched successfully from Cape Canaveral using Atlas V 541 rocket and began its journey to Mars. MSL carries the biggest and the most robust Mars rover ever built.... Read more »
Golombek, et al. (2004) Surfical geology of the Spirit rover traverse in Gusev Crater: dry and desiccating since the Hesperian. Second Conference on Early Mars . info:/
Squyres SW, Arvidson RE, Bell JF 3rd, Brückner J, Cabrol NA, Calvin W, Carr MH, Christensen PR, Clark BC, Crumpler L.... (2004) The Opportunity Rover's Athena science investigation at Meridiani Planum, Mars. Science (New York, N.Y.), 306(5702), 1698-703. PMID: 15576602
Sallé, B., Lacour, J., Mauchien, P., Fichet, P., Maurice, S., & Manhès, G. (2006) Comparative study of different methodologies for quantitative rock analysis by Laser-Induced Breakdown Spectroscopy in a simulated Martian atmosphere. Spectrochimica Acta Part B: Atomic Spectroscopy, 61(3), 301-313. DOI: 10.1016/j.sab.2006.02.003
- November 23, 2011
- 12:03 PM
- 1,004 views
O Brother, Where Art Thou? – Estimating fp
by Olga Vovk in Milchstraße
In Drake equation, fp stays for a fraction of stars that have planets. The Drake estimate for this parameter was fp=0.5. Which means that 50% of stars in Milky Way may have planets. In its modern estimate fp~ 0.4 (Marcy et al , 2005), however this number can become much higher with developing more precise techniques for planet detection.... Read more »
Chambers J. (2010) Extrasolar planets: More giants in focus. Nature, 467(7314), 405-6. PMID: 20864987
Goud et al. (2010) Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008. Astrophysics Earth and Planetary Astrophysics. DOI: arXiv:1001.0572
- November 23, 2011
- 10:18 AM
- 815 views
Signal received from the lost Russian Phobos-Grunt Mars probe
by Olga Vovk in Milchstraße
Signal received from the lost Russian Phobos-Grunt Mars probe... Read more »
Harvey, Brian. (2007) The rebirth of the Russian space program 50 years after Sputnik, new frontiers . Springer-Praxis books in space exploration. info:other/
- November 23, 2011
- 10:08 AM
- 233 views
Signal received from the lost Russian Phobos-Grunt Mars probe
by Olga Vovk in Milchstraße
... Read more »
Harvey, Brian. (2007) The rebirth of the Russian space program 50 years after Sputnik, new frontiers . Springer-Praxis books in space exploration. info:other/
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