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The NexStar User’s Guide II by Michael Swanson
epub |eng | | Author:Michael Swanson

Setting Filter Limits on the NexStar Hand Control Press the MENU button, scroll to Scope Setup and press ENTER. Scroll to Filter Limits, press ENTER and you will be presented ...
( Category: Astronomy July 1,2020 )
Space at the Speed of Light by Dr. Becky Smethurst
epub |eng | 2020-06-02 | Author:Dr. Becky Smethurst [Smethurst, Becky]

The universe sprang into being, in a wondrous storm of creation, 14 billion years ago; 9.5 billion years later, the Sun, the Earth, and the solar system started to take ...
( Category: Astronomy June 30,2020 )
Dynamics of Extremal Black Holes by Stefanos Aretakis
epub, pdf |eng | | Author:Stefanos Aretakis

2.3.6 Asymptotics for Type B Perturbations Perturbations of Type B satisfy and and hence represent local perturbations from afar. In the physics literature, such perturbations represent ingoing radiation. Recall that ...
( Category: Astronomy June 30,2020 )
The Amazing Unity of the Universe by Edward van den Heuvel
epub |eng | | Author:Edward van den Heuvel

The discovery of the cosmic microwave background radiation has transformed cosmology from a speculative theoretical science into a quantitative observational science, based on solid observational facts. Prior to this, physicists ...
( Category: Astrophysics & Space Science June 30,2020 )
After Apollo? by John M. Logsdon
epub, pdf |eng | 2015-06-14 | Author:John M. Logsdon

A 1971-vintage artist’s concept of a two-stage fully reusable space shuttle. (Illustration courtesy of Dennis Jenkins) Low Has Reservations George Low, at that time still NASA acting administrator, reluctantly approved ...
( Category: Astronautics & Space Flight June 30,2020 )
Science with the Cherenkov Telescope Array by The CTA Consortium
epub |eng | | Author:The CTA Consortium

( Category: Astrophysics & Space Science June 29,2020 )
Choosing and Using Astronomical Filters by Martin Griffiths
epub |eng | | Author:Martin Griffiths

One does not need a very large telescope to observe these details. Most observers use a 60-mm telescope or smaller, as the Sun is very large and relatively close as ...
( Category: Electronics June 29,2020 )
Stamping Through Astronomy by Renato Dicati
epub |eng | | Author:Renato Dicati

In 1887, the 50 members of the Astrographic Congress who met in Paris decided to start mapping the stars with a full-sky camera. Thus was born the project “Carte du ...
( Category: Astronomy June 29,2020 )
Cycles of Time by Roger Penrose
epub |eng | 2011-05-03 | Author:Roger Penrose [Penrose, Roger]

Fig. 3.4 There will be the occasional ‘rogue’ electron or positron, ultimately trapped within its horizon and unable to lose its electric charge through pair annihilation. A more radical resolution ...
( Category: Cosmology June 29,2020 )
100 Things to See in the Night Sky, Expanded Edition by Dean Regas
epub, pdf |eng | 2020-06-16 | Author:Dean Regas

HOW TO FIND IT Although Corvus is a small constellation it is moderately easy to find in the sky. Look for a trapezoid shape of four semi-bright stars riding on ...
( Category: Astronomy June 28,2020 )
From Dust to Life by Chambers John; Mitton Jacqueline;
epub |eng | 2013-06-14 | Author:Chambers, John; Mitton, Jacqueline;

EARTH To understand how Earth became the planet we see today, it helps to understand its structure. Geologists are at a distinct disadvantage compared to astronomers in that they can’t ...
( Category: Astrophysics & Space Science June 28,2020 )
A Short Course in General Relativity and Cosmology by Reinhard Hentschke & Christian Hölbling
epub |eng | | Author:Reinhard Hentschke & Christian Hölbling

(7.8) The universe it describes is homogenous and bounded. Fig. 7.3A possible time history of the circular universe A generalisation to three-dimensional space and four-dimensional spacetime is (7.9) Note that ...
( Category: Astronomy June 28,2020 )
Scattering and Structures by Bogdan Povh & Mitja Rosina
epub |eng | | Author:Bogdan Povh & Mitja Rosina

Energy conservation implies that (10.1) where is the speed after the production of the excitation. Momentum conservation additionally requires (10.2) It is easy to see that the phonon excitation first ...
( Category: Particle Physics June 28,2020 )
Imaging the Southern Sky by Stephen Chadwick & Ian Cooper
epub |eng | | Author:Stephen Chadwick & Ian Cooper

NGC 7098 Constellation Octans RA 21 h 44 min 18 s Dec −75° 07′ This is probably the best galaxy in the constellation of Octans. It is a barred-ring spiral ...
( Category: Astronomy June 28,2020 )
Dante and the Early Astronomer by Tracy Daugherty;
epub |eng | | Author:Tracy Daugherty;

Fig. 16. Dante’s universe as illustrated in Mary’s book Dante and the Early Astronomers. In The Divine Comedy, Dante added a ninth heaven, the Primum Mobile, a crystalline sphere, luminous ...
( Category: Renaissance June 28,2020 )

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