Variable Star Nights
stars that make a difference
Some Astronomy by John O'Neill
Carpe Noctum

mercury transit

Transit of Mercury 11 November 2019. See details.


2018 Y1 Iwamoto, another low surface-brightness comet, on 14-15 February 2019. See details.


Total Lunar Eclipse on night of 20-21 January 2019. See details and another image.


46P/Wirtanen, low surface-brightness comet, on 12-13 January 2019. See details.

All content and photos (unless stated) are by John O'Neill. © None may be reproduced without permission.
Variable Star Nights ( Site updated: 11 November 2019 (update history). Unless noted, all dates and times are in UT.

I have given talks for AAVSO, Cosmos Star Party, Cork AC, DIAS (Dunsink Obs.), IAA, IAS, IAS Astrofest, IFAS Solarfest, NIAAS, Rush AG, Schull Planetarium, South Dublin AS and the Stellafane Convention (Vermont).