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Mineralogical Confirmation for Liquid Water on Present-day Mars
Mineralogical Liquid Water Present-day Mars
2015/10/13
Lujendra Ojha, the Georgia Tech Ph.D. candidate who led the study, first noticed these puzzling features in High Resolution Imagine Science Experiment (HiRISE) images returned by the MRO spacecraft as...
A multiple-beam CLEAN for imaging intra-day variable radio sources
Methods: data analysis – Techniques: image processing – Radio continuum: general
2011/10/13
The CLEAN algorithm, widely used in radio interferometry for the deconvolution of radio images, performs well only if the raw radio image (dirty image) is, to good approximation, a simple convolution ...
Interpretation of the 115 Day Periodic Modulation in the X-ray Flux of NGC 5408 X-1
the 115 Day Periodic Modulation the X-ray Flux NGC 5408 X-1
2011/1/11
We comment on the recent observation of a 115-day modulation in the X-ray flux of the ultraluminous X-ray source (ULX) NGC 5408 X-1, and in particular, the interpretation of this modulation as the orb...
Interpretation of the 115 Day Periodic Modulation in the X-ray Flux of NGC 5408 X-1
the 115 Day Periodic Modulation the X-ray Flux NGC 5408 X-1
2011/1/11
We comment on the recent observation of a 115-day modulation in the X-ray flux of the ultraluminous X-ray source (ULX) NGC 5408 X-1, and in particular, the interpretation of this modulation as the orb...
Wind estimate ‘shortens Saturn’s day by five minutes’（图）
shortens Saturn’s day wind five minutes’
2009/8/3
A new way of detecting how fast large gaseous planets are rotating suggests Saturn’s day lasts 10 hours, 34 minutes and 13 seconds – over five minutes shorter than previous estimates that were based o...
CCDs and CCD controllers for the GTC Day One。
CanariCam：The GTC＇s Multimode Mid-Infrared Camera for Day One。
27-day variations of the galactic cosmic ray intensity and anisotropy
cosmic ray intensity 27-day variations
2009/5/27
We study the 27-day variations of the galactic cosmic ray (GCR) intensity and three dimensional (3-D) anisotropy in different polarity periods of the solar magnetic cycle. We found that the larger am...
THE 50-DAY OSCILLATION IN THE EARTH`S ROTATION, ATMOSPHERIC ANGULAR MOMENTUM AND SOLAR ACTIVITY
50-DAY OSCILLATION THE EARTH`S ROTATION ATMOSPHERIC ANGULAR MOMENTUM
2009/4/8
THE 50-DAY OSCILLATION IN THE EARTH`S ROTATION, ATMOSPHERIC ANGULAR MOMENTUM AND SOLAR ACTIVITY。
Feb 03, 2007，A video captured by NASA's Opportunity rover shows the formation of convective water clouds on Mars. The clouds are in some ways similar to clouds seen on Earth...but in other ways they a...