This is the twentyninth episode in our ongoing series about the constellations. In this episode, we seek out two smaller spring constellations, Corvus the Crow and Crater the Cup. We discuss the origins of the Caldwell Catalog of deep sky objects, and take a closer look at Caldwell 60 and 61, the Antennae Galaxies.

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Planetarium visuals were created using Digistar 6 by Evans & Sutherland.

Image Credits:

"Sir Patrick Moore at the opening of the South Downs Planetarium" by South Downs Planetarium is licensed with CC BYSA 3.0. To view a copy of this license, visit https://creativecommons.org/licenses/...

NOAO ANTENNAE GALAXIES
Bob and Bill Twardy/Adam Block/NOAO/AURA/NSF

Antennae Galaxies reloaded
ESA/Hubble & NASA

ARP Galaxies in the NGC4038 Antennae Group
Kees Scherer
This photo is marked in the public domain.

Charles Messier Portrait
Nicolas Anseaume
This portrait is in the public domain.

M33
This photo by ESO is licensed with CC BY 4.0. To view a copy of this license, visit https://creativecommons.org/licenses/...

M45
NASA, ESA and AURA/Caltech

M13
NASA, ESA, and the Hubble Heritage Team (STScI/AURA);
Acknowledgment: C. Bailyn (Yale University), W. Lewin (Massachusetts Institute of Technology), A. Sarajedini (University of Florida), and W. van Altena (Yale University)

C63
NASA, NOAO, ESA, the Hubble Helix Nebula Team, M. Meixner (STScI), and T.A. Rector (NRAO)

C30
ESA/Hubble & NASA/D. Milisavljevic (Purdue University)

C11
NASA, ESA, and the Hubble Heritage Team (STScI/AURA)

Video Credits:
Animation of Milky Way Andromeda merger
Frank Summers (STScI), Gurtina Besla (Columbia University), and Roeland van der Marel (STScI)

Music Credits:

"Galaxies" from the album "Echoes" by the artist Stellardrone. The song has been modified in length from the original. Music is used here under a Creative Commons 3.0 Attribution Unported License.

stellardrone.bandcamp.com/album/echoes
creativecommons.org/licenses/by/3.0/