I have added and updated the materials below.
(Individual renewal dates are written in accordance with Japan Standard Time, JST)

3 images of Around Star Cloud in Sagittarius, Diffused Nebulae in Cygnus & Milky Way taken with whole-sky camera are replaced in Wallpapers.

3 images of NGC4183, NGC4242, UGC5829 are added in the album of Deepsky in Spring.

3 images of PK131-5.1, NGC7253 (Arp 278), Abell 2666 are added in the album of Deepsky in Autumn.

4 images of IC2149, Around Sh2-304, Around LBN777, B207, UGCA90 are added in the album of Deepsky in Winter.

3 images of NGC3432, NGC3642 & Antlia Cluster are replaced in the album of Deepsky in Spring.

2 images of M76 & Around vdB 9 are replaced in the album of Deepsky in Autumn.

A close-up image added in the page of Seagull Nebula (IC2177), 2 images of Around vdB27, IC359 to B217 & Sh2-253 are replaced in the album of Deepsky in Winter.

An image of IC1805 & IC1848 is replaced in Wallpapers.

Spectral profile of Blinking Planetary is replaced, Spectral profile of NGC7027 is added in the album of Deepsky in Summer.

2 images of NGC7027 & Sh2-116 are added in the album of Deepsky in Summer.

3 images of NGC7757, Abell 79 & Abell 80 are added in the album of Deepsky in Autumn.

A page of Saturnian occultation on Dec 8, 2024 is added in the album of Eclipse.

2 images of The Pleiades & Wide field around Cone Nebula are replaced in Wallpapers.

An image of Barnard's Loop (Sh2-276) is replaced in the album of Deepsky in Winter.

4 images of Sh2-240, Sh2-260, 262, NGC1097, and NGC1395 are replaced in the album of Deepsky in Winter.

3 images of Cetus, Eridanus & Fornax, and Taurus are replaced in the album of Constellations.

A page of Comet Tsuchinshan-ATLAS on Nov 22 is added in the album of Comets & Meteors.

2 images of NGC6894 & NGC7008 are added in the album of Deepsky in Summer.

4 images of NGC7094, Around vdB10, Abell84, Around LBN668 are added, an image of NGC672, IC1727 is replaced in the album of Deepsky in Autumn.

An image of NGC1084 is replaced in the album of Deepsky in Winter.

A page of Comet Tsuchinshan-ATLAS on Nov 3 is added in the album of Comets & Meteors.

An image of Around Sh2-211, 212 is replaced in the album of Deepsky in Autumn.

2 images of NGC2264 & Cone Nebula & Sh2-261 are replaced inthe album of Deepsky in Winter.

A page of Jupiter images in season of 2024 is added in the album of Moon & Planets.

A page of Comet Tsuchinshan-ATLAS on Oct 15 is added in the album of Comets & Meteors.

A page of Comet Tsuchinshan-ATLAS on Oct 13 is added in the album of Comets & Meteors.

7 images below added in the album of Deepsky in Summer.
NGC6905(Blue Flash Nebula), Around Sh2-66, 67 & 69, Sh2-90, Sh2-93, Sh2-97, Abell 53, Around NGC6269
A close-up image added in the page of M16.

5 images below added in the album of Deepsky in Autumn.
IC5148(Spare Tire Nebula), NGC7424, Around NGC7556, Around IC1501, Andromeda I

5 images of Around Sh2-157, NGC7727, NGC129, NGC225, Around NGC663 & M103 are replaced in the album of Deepsky in Autumn.

An image of The Perseids meteor shower 2024 is added in the album of Comets & Meteors.

2 pages of Sunspot Group #3780 in Aug 2024 & Approach of Jupiter & Mars (Early morning of Aug 11, 2024) are added in the album of Moon & Planets.

An image of Comet Olbers on Aug 11 is added in the album of Comets & Meteors.

A page of Saturn images in season of 2024 is added in the album of Moon & Planets.

2 images of Sh2-46 & Around B292, B295 are added, an image of M17 is added in the album of Deepsky in Summer.

An image of Comet 2023A3 Tsuchinshan-ATLAS on Jun 29 is added in the album of Comets & Meteors.

An image of Sh2-48, Sh2-50 is added, an image of M16 is added in the album of Deepsky in Summer.

A time-lapse movie of Rising summer Milky Way 2024 is added in the album of Stellar Scenes.

An image of Abell 1775 is added in the album of Deepsky in Spring.

Following 7 images are added in the album of Deepsky in Summer.
NGC6240, NGC6813, Around Sh2-62, Sh2-64, Sh2-74, Sh2-82, Sh2-83, Abell 2256

3 images of Around M24, NGC6334, NGC6357, Sh2-1, Sh2-7 are replaced in the album of Deepsky in Summer.

An image of NGC2276, NGC2300 is replaced in the album of Deepsky in Winter.

4 images of Around IC1283, Around Sh2-68, Tadpole Galaxy & Arp 330 are replaced in the album of Deepsky in Summer.

3 images of Comet 2021S3 PanSTARRS on early morning of May 4, Comet Tsuchinshan-ATLAS on May 3 & Comet Olbers on May 4 are added in the album of Comets&Meteors.

An images of Close-up of Coma Cluster is added in the album of Deepsky in Spring.

2 images of NGC5987 & IC1101 are added in the album of Deepsky in Spring.

3 images of NGC6670, Sh2-78 & Abell 39 are added in the album of Deepsky in Summer.

2 images of NGC4631, NGC4656 & NGC6015 are replaced in the album of Deepsky in Spring.

An image of NGC6140 is replaced in the album of Deepsky in Summer.

3 images of Comet Pons-Brooks on Apr 10, comet 2021S3 PanSTARRS on early morning of Apr 13 & comet 2023A3 Tsuchinshan-ATLAS on Apr 13 are added in the album of Comets&Meteors.

6 images of Around NGC3447, NGC4592, NGC4636, Around NGC4666, Around NGC5899, Molecular cloud around ο UMa are added in the album of Deepsky in Spring.

2 images of Around NGC6286 & Arp102 are added in the album of Deepsky in Summer.

2 images of IC2120 & Molecular cloud around central Camelopardalis are added in the album of Deepsky in Winter.

An images of The Virgo Cluster is replaced in the album of Deepsky in Spring.

5 images of NGC2835, NGC4517, NGC4753, NGC4939, NGC5018, NGC5022 are replaced in the album of Deepsky in Spring.

An image of NGC2207 & IC2163 is replaced in the album of Deepsky in Winter.

An image of Comet Pons-Brooks on Mar 16 is added in the album of Comets&Meteors.

2 pages of Comet Pons-Brooks on Mar 9 & Comet 2021S3 PanSTARRS on early morning of Mar 9, 2024 are added in the album of Comets&Meteors.

An images of Comet Pons-Brooks on Mar 2, Comet Tsuchinshan1 on Mar 2 & Comet Kushida on Mar 2 are added in the album of Comets&Meteors.

2 images of NGC2654 & NGC4136 are added, 2 images of NGC4065 Group & Coma Cluster (Abell 1656) are replaced in the album of Deepsky in Spring.

An image of NGC2149 is added in the album of Deespky in Winter.

3 images of M48, Around M97 & M108, and Leo I are replaced in the album of Deepsky in Spring.

2 images of M45(The Pleiades), and Around Sh2-232 are replaced in the album of Deepsky in Winter.

6 images of Around NGC4958, UGC4305(Holmberg II), M101, NGC4027, NGC3981 & NGC3640 are replaced in the album of Deepsky in Spring.

An image of NGC1409, NGC1410 is replaced in the album of Deepsky in Winter.

4 images of Comet Pons-Brooks on Feb 10, Comet Tsuchinshan1 on Feb 9, Comet Kushida on Feb 11 & Comet 2021S3 PanSTARRS on early morning of Feb 10 are added in the album of Comets&Meteors.

2 images of Around NGC4274 and NGC4030 are replaced in the album of Deepsky in Spring.

An image of vdB55 is added, close-up image is added in a page of vdB62 in the album of Deepsky in Winter.

3 images of Comet Pons-Brooks on Jan 13, Comet Tsuchinshan1 on Jan 12 & Comet Kushida on Jan 12 are added in the album of Comets&Meteors.

2 images of IC2172 (NGC2282) & vdB49 are added, an image of California Nebula, Pleiades & Hyades is replaced in the album of Deepsky in Winter.

An image of Comet Pons-Brooks on Jan 5 is added in the album of Comets & Meteors.

4 images of NGC4293, NGC4448, NGC4689 & Abell 754 are added in the album of Deepsky in Spring.

2 images of Around Hind's variable nebula to Sh2-239 & NGC1350 are added, an image of Barnard's Loop to Rosette Nebula is replaced in the album of Deepsky in Winter.