1. Evolution of the Structure of Edge-On Spiral Galaxies

   • V. P. Reshetnikov
   • P. A. Usachev

   OriginalPaper 09 March 2021 Pages: 1 - 7

2. Panoramic Spectroscopy of Galaxies with Star-Formation Regions. A Study of SBS 1539+597

   • S. Hakopian
   • S. Dodonov
   • A. Moiseev

   OriginalPaper 08 March 2021 Pages: 8 - 19

3. Investigations of the Periodic Variables in the Catalina and Linear Databases

   • K. S. Gigoyan
   • G. R. Kostandyan
   • G. Paronyan

   OriginalPaper 08 March 2021 Pages: 20 - 32

4. Light Curve Analysis of some Eclipsing Binary Systems

   • M. S. Aleanzi
   • M. M. Elkateeb

   OriginalPaper 08 March 2021 Pages: 33 - 40

5. Orbits and Individual Masses of Some Visual Binaries

   • E. A. Elkholy
   • W. H. Elsanhoury
   • M. I. Nouh

   OriginalPaper 08 March 2021 Pages: 41 - 53

6. Accretion and Magnetic Fields of Herbig Ae/Be Stars

   • A. F. Kholtygin
   • O. A. Tsiopa
   • O. A. Merkulova

   OriginalPaper 08 March 2021 Pages: 54 - 60

7. Interrelationships between Halo-Type Coronal Mass Ejections and Solar Flares Based on Observations in the 23rd and 24th Cycles

   • E. A. Bruevich
   • V. A. Burov
   • Yu. P. Ochelkov

   OriginalPaper 08 March 2021 Pages: 61 - 70

8. Cyanamide (NH₂CN) in Interstellar Medium: Potential Spectral Lines

   • M. K. Sharma

   OriginalPaper 08 March 2021 Pages: 71 - 80

9. Sobolev LVG Analysis of Prebiotic Molecule Formamide (NH₂CHO) Found in the ISM

   • M. K. Sharma
   • V. D. Mampatta
   • S. Chandra

   OriginalPaper 08 March 2021 Pages: 81 - 90

10. Non-Singular Coordinates of Some Black Hole in f(R) Gravity

    • S. M. J. Riaz
    • R. Hussain

    OriginalPaper 08 March 2021 Pages: 91 - 102

11. FRW Domain Walls in Modified f(G) Theory of Gravitation

    • S. D. Katore
    • S. P. Hatkar
    • P. S. Dudhe

    OriginalPaper 08 March 2021 Pages: 103 - 116

12. Generation of Nano-Outbursts in Pulsar Emission in the Crab Nebula

    • G. Machabeli
    • I. Malov
    • N. Kevlishvili

    OriginalPaper 08 March 2021 Pages: 117 - 125

13. Emission Spectrum of Dust in a Cooling Gas

    • S. A. Drozdov

    OriginalPaper 08 March 2021 Pages: 126 - 140