... March 24, 1996 . Comet Hyakutake's Closest Approach . ... Explanation: The above true color image of Comet Hyakutake was taken the night of March 21/22. Tonight, Comet Hyakutake will make its nearest approach to Earth, closing to a mere 10 million miles as it passes over the planet's Northern Hemisphere . ... For the rest of March and most of April Comet Hyakutake will be visible to Northern viewers (weather permitting). ... Comet Hyakutake Finder Chart . ... About APOD | ...

... Comet Hyakutake's Closest Approach . ... From dark sky areas, it's tail may be seen to cover about 20 degrees on the sky (40 times the apparent diameter of the full moon) corresponding to well over 3 million miles. at the distance of the comet. The word comet, referring to the tail, derives from the Greek "aster kometes", meaning long-haired star - and the hair of comet Hyakutake continues to grow as it nears the Sun! ... Hyakutake: Stars Through A Comet Tail . ... Comet Hyakutake Passes the Sun . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Armagh Observatory, 11 June 2015: Armagh Observatory reports that the next two weeks will provide an interesting opportunity to observe the brightest planet, Venus, and the largest planet, Jupiter, as they move towards one another in the evening twilight. ... The image shows the sky view towards the West at around 11pm on 20 June 2015. ... Professor Mark E. Bailey, Armagh Observatory, College Hill, Armagh BT61 9DG. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The Moon only shows one face to us because it is not rotating. Better astronomy : The Moon only shows one face because it is rotating, once every time it revolves around the Earth. ... Place the Moon model on the table about 30 centimeters (one foot) away with the X facing the Earth model. ... You'll see that to keep the X facing the Earth model, you have to rotate the Moon model as it goes around the Earth model . ... 2008 Phil Plait. ...

Next: Model Fitting Up: Maximum Likelihood Estimation of Previous: Maximum Likelihood Estimation of . ... Most of the objects detected are faint galaxy images. ... Parameters used in the model definition are then estimated by maximizing the likelihood function, which is the probability of obtaining each observed image for any set of galaxy parameters. Tests of the procedure on simulated galaxy images show that derived model parameters and their error estimates are unbiased. ...

The efficiency of interaction of radiation with a particle and hence its optical properties depend on the particle chemical composition, size, shape, structure, etc. ... Particle size expressed in units of the wavelength of incident radiation, together with chemical composition, most strongly affects the optical properties of a scatterer. ... There are many methods to solve the light-scattering problem for a homogeneous spheroid (our survey of the light-scattering methods see here ). ...

... ESO for the Public > Doing Business with ESO > Technology Transfer > Technologies that have been developed or extended by industry through the execution of an ESO procurement contract . ... The technology was tested on a small mosaic for EMMI on the ESO 3.6m telescope, and then two larger mosaics for UVES on the VLT. ... The successful completion of the VLT contract by Schott allowed them to extend and prove their technology, and puts them in a strong position to bid for future large optics. ...

EMERGENCY ENCLOSURE CLOSING . ... In general, emergency systems/procedures have been put in place for electrical power failure and/or for enclosure controller/ motor drive failure. ... In the event the emergency generator fails to start or generate power, use procedure 3.0 for motor drive/controller failure except, you will need to plug the 2 winches into the portable Kubota generator which is stored in the garage. ... AT EACH WINCH, PULL BACK THE HUB DRIVE TO RELEASE THE CABLE DRUM. ...

... The fitting routines in MIDAS were developed in close collaboration with O. Richter and later upgraded by Ph. ... The multivariate statistical package has been developed in close collaboration with F. Murtagh. ... Marguerite Pierre developed modelling commands for interstellar absorption work and contributed to the Long Slit package. ... The Wavelet package was implemented by J. L. Starck and contains both general routines for wavelet transforms and special applications e.g. for deconvolution. ...

... The concept of continuous solar wind developed in 1950's. First, Biermann (1951, 1957) observed comet tails as they passed close to the Sun , and explained the observed tail deflection by a continuous flux of protons from the Sun. Then Parker (1959) showed that the solar corona must expand, and called the outward streaming coronal gas 'solar wind'. ... The expanding solar wind drags also the solar magnetic field outward, forming what is called the interplanetary magnetic field (IMF) . ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

... Comet Tutorial . ... On July 1, 1993 an image was taken with the Hubble Space Telescope (HST) that clearly shows at least 15 individual fragments in one image frame of the train. ... This made an accurate orbit (or orbits) difficult to determine; however, after numerous observations of the comet, astronmers determined that the comet had passed within 96,000 kilometers (60,000 miles) of the center of Jupiter or 25,000 kilometers (16,000 miles) from the cloud tops during the July 8, 1992, approach. ...

... Planets . ... Earth Satellites . ... Looking in the direction of the constellation Cygnus the Swan and launched by NASA in 2009 is the Kepler Space Observatory.Many previous missions searching for exoplanets mainly detected large giant planets, like large hot Jupiters (it is easier to detect larger planets).However KeplerтАЩs main objective is to search for much smaller planets located in a habitable zone which is not too close nor too far from their star; planets which may be just like our Earth. ...

Astronomical Data Analysis Software and Systems XIII ASP Conference Series, Vol. ... Skysoft is a YAASD (Yet Another Astronomical Software Directory), but with a different overall approach. To be useful, Skysoft needs to be a long­lived pro ject, setting little pressure for maintenance, imposing a very low nuisance level to the developers community, and requiring a lowmaintenance cost. ... This site is designed so that software developers acquire more visibility because of astronomical context. ...

The Arecibo Galaxy Environment Survey (normally known as AGES) is using the Arecibo Telescope to search for galaxies in a number of quite different areas of the local universe. ... NGC 628 group (precursor) - published (Auld et al., ... NGC 1156 (isolated galaxy) - published (Minchin et al, 2010, AJ, 140, 1093) . NGC 7332/9 galaxy pair - published (Minchin et al, 2010, AJ, 140, 1093) . ... NGC 5523 (isolated galaxy) - completed (contact: Robert Minchin) . ... AGES team page - password protected . ...

... This is the both the simplest and the most effective option for reducing the "address already in use" error. ... A situation where this might be a problem is if my program is trying to find a reserved local port ( SO_REUSADDR , then each time I run the program on my machine, I'll keep getting the same local reserved port, even if it is stuck in TIME_WAIT , and I risk getting a "connect: Address already in use" error if I go back to any place I've been to in the last few minutes. ...

Detecting extended radio emission : SNRs , Relics , Halos Head-Tailed Galaxies Melanie Johnston-Hollitt Christopher Hollitt 2010 Detecting extended radio emission : SNRs , Relics , Halos Head-Tailed Galaxies 2010 1/14 Detecting extended radio sources Methods of detecting extended ... Detecting extended radio emission: SNRs, Relics, Halos & Head-Tailed Galaxies 2010 7/14 Some SNRs Supernova remnants are typically circular. ...

... In this sound clip, we journey to the violent heart of a galaxy. We start off flying through the outskirts of a galaxy (hissing noise) passing various stars (different loud hisses) before penetrating the vast nebula surrounding the black hole that lurks in the middle. ... Sounds of Nebulae (864kb). ... Planetary Nebulae: Movie and Sounds (1Mb). ... Comet Song (664kb) Listen as a comet approaches the Sun and bursts into song, before fading back into the outer darkness. ...

... Imaging of the core of the OMC-1 region using NICMOS camera 2 through the F212N and F215N filters shows a wide variety of interesting structure on scales of 0.2" at a very high dynamic range (Stolovy et al. ... The application of image restoration techniques, including multi-channel variants of the Richardson-Lucy technique, offers the chance to enhance structure on the finest scales and also to suppress the prominent and richly structured point-spread functions of the many bright stars in the...

. Pulkovo NEO Page . Central Astronomical Observatory at Pulkovo . of Russian Academy of Sciences, St.-Petersburg, Russia . Apparent Close Approaches of Near-Earth Asteroids to the Stars for April 2016 . By these observations it is possible to obtain the positions of asteroids with higher accuracy. This page includes the ephemerides of such phenomena for some observatories, namely: . Pulkovo . CrAO . Kourovskaya . Majdanak . Pulkovo Obs. Mountain Station . Mondy .