"Zvaigžņotā Debess" The Starry Sky Summer 2020 (248) CONTENTS

ACTUALITIES
The News Briefly. Ilgonis Vilks, Raitis Misa. Page 2.
On the Way to the Millimeter Accuracy. Jānis Kaminskis. Page 6.
Adaptive Optics Studies at the University of Latvia. Varis Karitāns. Page 8.

EXPLORING THE UNIVERSE
Cosmic Rays in Action. Juris Kalvāns. Page 14.
Neutron Stars and the Hypernuclei. Olģerts Dumbrājs, Juris Lukstiņš. Page 20.

SOLAR SYSTEM
Secrets of the Solar Wind Origin. Artūrs Vrubļevskis. Page 25.

SPACEFLIGHT
Starlink Satellite Expansion. Raitis Misa. Page 32.
A Rocket from the Hobbit’s Land. Raitis Misa. Page 38.

OLYMPIC CHALLENGE
Brightness and the Luminosity of the Celestial Bodies. Prepared by Māris Krastiņš. Page 41.

NEW BOOK
A Collection of Articles about Friedrich Zander is Published. Ilgonis Vilks. Page 43.

ASTROSITE
Theide Observatory in Tenerife. Jānis Kauliņš. Page 45.

PHOTO STORY
Silver Coin at the Southern Sky. Kristaps Kemlers. Page 46.

AMATEUR ASTRONOMY
What Happened to the Betelgeuse? Ilgonis Vilks. Page 48.
Read, Listen, Look. Anna Gintere. Page 51.

LATVIAN SCIENTISTS
Life Dedicated to the Radiotelescope Dishes. Edgars Bervalds (1936-2019). Ilgonis Vilks. Page 54.

MOBILE APP
For the Quick Reference About the Sun and the Moon. Mārtiņš Gills. Page 59.

OVERVIEW OF THE SKY
Celestial Bodies in the Summer of 2020. Juris Kauliņš. Page 60.