| 4-1 | Artemis II Successfully Launches: First Crewed Lunar Mission in 50+ Years |
| 4-1 | Chinese Startup Sustain Space Validates Flexible Robotic Arm, Advancing On-Orbit Servicing |
| 4-2 | Artemis II Flight Day 2: TLI Burn Complete, Orion Officially En Route to the Moon |
| 4-3 | Tianlong-3 Maiden Flight Fails: China's Falcon 9-Class Commercial Rocket Encounters Anomaly |
| 4-3 | Soyuz-5 (Irtysh) Medium-Launch Vehicle Flight Test from Baikonur |
| 4-3 | SpaceX Files Confidential IPO Registration with SEC, Targeting Historic Public Listing |
| 4-4 | Artemis II Flight Day 3: Crew More Than Halfway to the Moon, Koch Views Lunar Surface from Docking Hatch |
| 4-4 | Northrop Grumman CRS-24 Resupply Mission Targeting April 8 Launch to ISS |
| 4-4 | Atlas V Successfully Launches 29 Amazon Leo Satellites, Accelerating Kuiper Constellation Buildout |
| 4-4 | China-ESA SMILE Satellite Completes Launch Preparations, Set for April 9 Vega-C Flight |
| 4-4 | Shenzhou-21 Crew Completes Second EVA, Approaching 150-Day On-Orbit Milestone |
| 4-5 | Artemis II Flight Day 4: Deep-Space Flying and Lunar Flyby Preparations Underway |
| 4-5 | Chang'e-4 Data Reveals "Cosmic Ray Cavity" in Cislunar Space, Offering New Insights for Deep Space Radiation Protection |
| 4-5 | China Achieves First Precise Thermal Conductivity Measurement of Single Lunar Soil Particles, Discovering Natural Super-Insulating Material |
| 4-5 | Saudi Arabia's Shams Satellite Launches Aboard Artemis II, Opening First National Space Weather Monitoring Mission |
| 4-5 | SpaceX Starship V3 First Flight Delayed to May — Third Consecutive Postponement |
| 4-5 | Artemis II Orion Spacecraft Toilet Malfunction: Frozen Waste Line and Burning Smell |
| 4-5 | Shenzhou-21 Crew Surpasses Five Months in Orbit, Space Station Scientific Experiments Progressing Steadily |
| 4-6 | 2026 China Space Conference (CSC2026) to be Held in Chengdu April 23–26 |
| 4-7 | Artemis II Completes Lunar Flyby: Breaks Apollo 13 Distance Record at 406,771 km from Earth |
| 4-7 | NASA Halts Work on SLS Mobile Launcher 2, Casting Doubt on Artemis IV and Beyond |
| 4-7 | NASA Administrator Isaacman Defends Steep Budget Cuts, Pledging Focus on "Bold Goals" |
| 4-7 | Hungary Taps Northrop Grumman for First National GEO Communications Satellite HUSAT |
| 4-7 | Starfish Space Raises Over $100 Million to Advance Otter On-Orbit Service Spacecraft |
| 4-7 | Long March 8 Launches 18 Satellites for Qianfan Constellation Batch 7 |
| 4-7 | NASA Completes First Return Correction Burn for Artemis II Mission |
| 4-7 | China Manned Space Program Officially Releases Tianzhou 10 Mission Identifier |
| 4-8 | Northrop Grumman CRS-24 ISS Resupply Mission Delayed Again to April 11 |
| 4-9 | China-ESA Joint SMILE Satellite Launch Postponed: Vega-C Rocket Subsystem Technical Issue, New Date TBD |
| 4-9 | China Launches 21 Satellite Internet LEO Satellites |
| 4-9 | German Isar Aerospace Spectrum Rocket Set for Second Test Flight, Critical Test for European Commercial Launch |
| 4-10 | Artemis II Science Experiments Underway as Orion Begins Return Trip to Earth |
| 4-10 | Long March Rockets Consecutively Launch: 18 More Sats for Thousand Sails, 21st Batch for GuoWang Constellation |
| 4-10 | Long March-6A Successfully Launches Mega Constellation Satellites |
| 4-10 | Chang'e-7 Probe Components Arrive at Wenchang Launch Site for Planned Second Half 2026 Launch |
| 4-10 | ESA's Celeste Satellite Successfully Broadcasts First Navigation Signal, Opening Low-Earth Navigation New Era |
| 4-11 | Artemis II Successful Splashdown: Historic Crewed Lunar Mission Concludes After 50+ Years |
| 4-11 | NASA Confident in Artemis II Heat Shield: Orion Thermal Protection Will Ensure Astronaut Safety |
| 4-13 | Rocket Lab CSD Satellite Dispensers Successfully Deploy CubeSats from Artemis II |
| 4-13 | Cygnus XL Cargo Spacecraft Successfully Docks with International Space Station |
| 4-14 | SpaceX Deploys 1,000th Starlink Satellite of 2026 |
| 4-15 | Parker Solar Probe Finds Surprises in Solar Explosion Events |
| 4-16 | SOHO Coronagraph Captures Sungrazer Comet Disintegrating Near the Sun |
| 4-17 | Commercial Space Safety Regulatory Meeting Held in Beijing: 2026 Key Tasks Deployed |
| 4-17 | China Launches High-Precision Greenhouse Gas Detection Satellite |
| 4-17 | Blue Origin New Glenn Rocket Orbital Deviation, AST BlueBird 7 Satellite to Be Controlled Deorbited |
| 4-17 | NASA Shuts Off Instrument on Voyager 1 to Keep Spacecraft Operational |
| 4-17 | Shenzhou-21 Crew Completes Third EVA, Commander Zhang Lu Sets New Personal Record |
| 4-17 | NASA Mobile Launcher Returns to VAB Ahead of Artemis III Mission |
| 4-17 | NASA SPHEREx Observatory Maps Interstellar Ice in Milky Way |
| 4-19 | Blue Origin New Glenn NG-3 Mission Success on First Flight |
| 4-19 | Blue Origin New Glenn Rocket Suffers First Launch Failure on BlueBird Block 2 Satellite |
| 4-19 | SpaceX Completes 600th Falcon Booster Landing Recovery |
| 4-20 | China Space Day 2026 Activities Announced |
| 4-20 | Latvia Signs Artemis Accords, Becomes 62nd Signatory |
| 4-20 | NASA X-59 Quiet Supersonic Aircraft Completes Wheel-Up Flight Test |
| 4-20 | NASA Hubble Telescope Releases New Image of Trifid Nebula for 36th Launch Anniversary |
| 4-20 | NASA Invites Media to SpaceX CRS-34 Mission, Targeting May 12 Launch |
| 4-20 | NASA Releases Initial Artemis II Post-Flight Assessment: Orion Heat Shield Outperforms Expectations |
| 4-20 | NASA Rolls Out Artemis III SLS Core Stage for 2027 Crewed Moon Landing Mission |
| 4-21 | SpaceX Successfully Launches GPS III SV10: Final GPS III Satellite Enters Orbit, Hedy Lamar-Named Satellite Officially Launched |
| 4-21 | What Are NASA's Ames Contributions to Artemis II? |
| 4-21 | NASA Partners with Organ Sharing Network UNOS to Study Faster Organ Transport Technology |
| 4-21 | Curiosity Rover Finds Most Diverse Collection of Organic Molecules in Martian History |
| 4-21 | NASA Hubble Releases Stunning New Image of the Crab Nebula for 36th Launch Anniversary |
| 4-22 | Rocket Lab HASTE Mission Preview: Bubbles Scientific Payload Ready for Launch |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | Jordan to Sign Artemis Accords on April 23 |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Invests $16.3 Million to Support Small and Medium Space Enterprises |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Releases Artemis II Image and Video Recap: Key Mission Moments |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Releases New Earth Views from Artemis II Mission: Phytoplankton and Aurora Together |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Earth Observatory Releases Satellite Image of Green Spaces in Washington Suburbs: Urban Green Belts and Human Settlements |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | Curiosity Rover Sols 4867-4872: Exploring Antofagasta Crater and Selecting Next Drilling Target |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | FAA Grounds Blue Origin's New Glenn After Launch Fails to Deploy Satellite |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | 2026 China Space Conference (CSC2026) to Open in Chengdu on April 23 |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | China's First Batch of International Astronauts Selected |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA at SXSW: Johnson Center Director Vanessa Wyche on Why Artemis Changes Everything |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Wins Two Webby Awards and Five People's Voice Awards at 30th Annual Awards |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | Long March 4C Successfully Launches Atmospheric Monitoring Satellite |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | SpaceX Successfully Launches GPS III SV10 Satellite |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | Blue Origin's New Glenn Rocket Fails to Reach Orbit |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Releases Earth Day Image Captured by Artemis II Crew |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Earth Observatory Image: Green Belts in Washington Suburbs |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Targets Early September for Roman Space Telescope Launch |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA's Modified Boeing 777 Returns to Fleet as Next-Generation Airborne Science Laboratory |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA to Host News Conference with Astronaut Anil Menon on Upcoming ISS Mission |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | Rocket Lab HASTE Successfully Launches Hypersonic Test Mission |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | SpaceX Drone Ship JRTI Completes Final Falcon 9 Landing |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-22 | NASA Selects SpaceX Falcon Heavy to Launch ESA Rosalind Franklin Mars Rover |
| 4-14 | Rocket Lab Unveils New Gauss Hall-Effect Propulsion System for Mass Production Constellations |
| 4-23 | China Space Conference 2026 (CSC2026) Opens in Chengdu |
| 4-23 | NASA Earth Observatory: Seasonal Fires Shroud Northern Thailand |
| 4-23 | Rocket Lab Completes 85th Mission and First Dedicated ESA Launch |
| 4-23 | SpaceX Launches Starlink Group 17-14 Mission |
| 4-23 | Rocket Lab 85th Mission Successfully Deploys JAXA Rideshare Satellite |
| 4-24 | 11th China Space Day: 70 Years of Journey to the Stars |
| 4-24 | Chang'e-7 Lunar South Pole Mission to Launch This Year |
| 4-24 | China Opens Xihe-2 Solar Observatory to International Cooperation |
