As the United States celebrates its 250th anniversary, the number of planets in our solar system has evolved from six to eight, reflecting humanity's growing understanding of the cosmos. Meanwhile, a recent X-class solar flare has triggered radio blackouts across North America, and NASA is addressing technical issues with Boeing's Starliner spacecraft.
What Happened
A restless Earth-facing sunspot unleashed a powerful X-class solar flare on June 30, triggering radio blackouts across parts of North America. The X1.1 solar flare erupted from sunspot region AR4479, peaking at 4:50 p.m. EDT (2050 GMT) according to NOAA's Space Weather Prediction Center. The intense burst of X-rays released during the eruption reached Earth in just over 8 minutes, triggering strong (R3) radio blackouts across the daylight side of Earth.
The Solar System's Evolving Definition
The definition of a planet has changed over the years, causing a bit of confusion. As astronomers have discovered new worlds, identified entirely new classes of celestial objects, and repeatedly revised the very definition of a planet, the number of "planets" in our solar system has ranged from six to nine — and, briefly, even 11 — depending on what astronomers knew at the time and how they defined a planet.
Space Exploration Advances and Challenges
NASA is addressing technical issues with Boeing's Starliner spacecraft, which has experienced helium leaks, propulsion system problems, and other challenges. A new audit warns that it's unclear when Boeing will be able to send more astronauts to the International Space Station. Meanwhile, research at Iowa State University is exploring how spaceflight reshapes human physiology from the cellular level upward, particularly the effects of microgravity on muscle health.
Key Facts
- What: X-class solar flare and coronal mass ejection (CME)
- Spacecraft: Boeing's Starliner
What Experts Say
"Many of these [Starliner] issues are related to three longstanding technical challenges that have prevented Boeing from obtaining the human-rating certification — helium leaks, propulsion system problems, and software issues." — NASA's Office of the Inspector General (OIG)
What Comes Next
As space exploration continues to advance, NASA and private companies like Boeing will need to address the challenges that come with space travel. The recent X-class solar flare serves as a reminder of the dynamic nature of space weather and the importance of monitoring and preparing for such events.