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The Downlink The WikiProject Spaceflight Newsletter
2025
1 — 30 June
Volume 3 — Issue 6
Spaceflight Project • Project discussion • Members • Assessment • Open tasks • Popular pages • The Downlink
In the News
Article of the month

Gaganyaan-1 (from Sanskrit: gagana, "celestial" and yāna, "craft, vehicle") will be the first uncrewed test flight of the Gaganyaan programme, with launch tentatively planned for Q4 2025.

The launch was originally scheduled for December 2020, then in December 2021, but it was delayed due to the COVID-19 pandemic. The flight plan was finally ready by April 2022 and the launch is expected to take place in early 2025, after the TV-D1, TV-D2, TV-D3 and TV-D4. It was proposed in April 2022 that the crew module should be depressurized, something kept in the final planning.

The Gaganyaan spacecraft will be launched, with the humanoid robot Vyommitra, by a Human-rated LVM 3 from Satish Dhawan Space Centre and inserted into a 170 x 408 km orbit. The circularisation maneuver will be performed at the third orbit. The landing should follow the same pattern as the TV-D1.

Image of the month
Hybrid-Propellant Rocket Fuel

Rocket engines typically use one of two types of propellant: Solid or liquid. Hybrid-propellant rockets use a combination of these two forms of fuel, and lack some of the disadvantages of both. Their specific impulse is usually between solid-propellant and liquid-propellant rockets. The image shown here is of a 3D-printed grain, designed for a small hybrid rocket engine which would be used to demonstrate rocket combustion. On the left are two helical fuel ports, on the right a de Laval nozzle.

Members

New Members:

Number of active members: 210. Total number of members: 436.

June Launches
All times stated here are in UTC. See a current list: here.


  1. United States Falcon 9 Block 5 — 26 Starlink (13 Jun. at 01:30) (success)
  2. Russia Angara A5 — 2 Kosmos (19 Jun. at 03:00) (success)
  3. United States Falcon 9 Block 5 — Axiom Mission 4 (25 Jun. at 06:31) (success)
  4. Japan H-IIAGOSAT-GW (28 Jun. at 16:33:03) (success)
Article Statistics
This data reflects values from 30 June 2025.

Monthly Changes

Since May 2025, one new high-importance, two new mid-importance, ten new low-importance, four new NA-importance, and twelve new unknown-importance articles have been created, for a total of 29 new articles. There is also one fewer A-class article, one more GA-class article, six more B-class articles, 13 more C-class articles, ten more Start-class articles, seven fewer Stub-class articles, and five more lists.

Discuss & propose changes to The Downlink at The Downlink talk page. To unsubscribe from the newsletter remove your name from the Mailing list.
Newsletter contributors: Ships&Space

MediaWiki message delivery (talk) 00:34, 23 July 2025 (UTC)[reply]