ALPO Logo Welcome to the Association of Lunar & Planetary Observers

ALPO Logo

)
ALPO Announcements
Participate in our Sections
Click any card below to visit that ALPO section

Solar Mercury Venus Lunar Mars Asteroids Jupiter Saturn Remote Planets Comets Meteors Meteorites Eclipses Training Outreach


The ALPO
JALPO Issues

Read News Headlines
Jupiter's Turbulent GRS
10/9/2024

NASA logoThe Hubble Space Telescope focused on Jupiter's iconic Great Red Spot for the first three months of this year. The scientists found that the storm is jiggling like gelatin, squeezing in and out at the same time as it moves faster and slower. UV observations also demonstrated that the core is brightest when the spot is at its greatest size during the oscillations.


Read More
Unraveling the Spiders on Mars
9/11/2024

NASA LogoNo, it’s not a throwback to David Bowie – NASA has been studying “spiders” on Mars and scientists at JPL think they have a better understanding of how they form. Discovered in 2003 via images from orbiters and more formally termed “Araneiform Terrain”, they appear as spider-like clusters of dark lines in Mars’ southern hemisphere. Recent experiments support the hypothesis that they form as the ground under the carbon dioxide ice is warmed and sublimates the ice, eventually cracking it and spewing out the dark material.


Read More
Check the Events Calendar
All Times are in Universal Time (UT)

2024-10-10 18:55
First Quarter Moon

2024-10-12
Comet C/2023 A3 (Tsuchinshan-ATLAS) reaches perigee

2024-10-14
Mars at Western quadrature; large NPH should be visible

2024-10-14 18:00
Saturn 0.1° south of Moon, occultation South Africa to China

2024-10-16 21:08
Start of Carrington Rotation 2290

2024-10-17 11:26
Full Moon, largest of the year

2024-10-19 21:00
Moon 0.2° north of Pleiades

2024-10-21
Orionid meteor shower

2024-10-24 08:03
Last Quarter Moon

2024-11-01 12:47
New Moon (lunation 1260)