SpaceX sent up the 40th rocket launch from the Space Coast on Tuesday morning.

A Falcon 9 carrying 23 Starlink satellites lifted off at 10:24 a.m. from Cape Canaveral Space Force Station's Space Launch Complex 40. The launch was delayed from Monday, but SpaceX did not give a reason for why they stood down from that attempt.

The first-stage booster made its 10th flight with a bullseye recovery landing downrange on the droneship A Shortfall of Gravitas stationed in the Atlantic.

SpaceX has managed 38 of the 40 launches from either Canaveral or neighboring Kennedy Space Center this year, and plans are to turn around launch pads even quicker in the second half of the year so the Space Coast could top 100 launches for the 2024.

This was SpaceX's eighth launch from the Space Coast for May.

All of SpaceX's launches so far have been Falcon 9 launches, but the first Falcon Heavy launch of the year is slated to fly on June 25 carrying the GOES-U weather satellite for the National Oceanic and Atmospheric Administration.

United Launch Alliance flew the other two Space Coast launches with the first ever Vulcan Centaur launch in January and the final Delta IV Heavy launch in April.

Scientists have come a step closer to identifying the mysterious origins of the "slow" solar wind, using data collected during the Solar Orbiter spacecraft's first close journey to the sun.

Solar wind, which can travel at hundreds of kilometers per second, has fascinated scientists for years, and new research published in Nature Astronomy, is finally shedding light on how it forms.

Solar wind describes the continuous outflow of charged plasma particles from the sun into space—with wind traveling at over 500km per second known as 'fast' and under 500km per second described as "slow."

When this wind hits the Earth's atmosphere it can result in the stunning aurora we know as the Northern Lights. But when larger quantities of plasma are released, in the form of a coronal mass ejection, it can also be hazardous, causing significant damage to satellites and communications systems.

Despite decades of observations, the sources and mechanisms that release, accelerate and transport solar wind plasma away from the sun and into our solar system are not well understood—particularly the slow solar wind.

Four zebrafish are alive and well after nearly a month in space aboard China's Tiangong space station. As part of an experiment testing the development of vertebrates in microgravity, the fish live and swim within a small habitat aboard the station.

While the zebrafish have thus far survived, they are showing some signs of disorientation. The taikonauts aboard Tiangong—Ye Guangfu, Li Cong, and Li Guangsu—have reported instances of swimming upside down, backward, and in circular motions, suggesting that microgravity is having an effect on their spatial awareness.

The zebrafish were launched aboard Shenzhou-18, which carried them, as well as a batch of hornwort, to orbit on April 25, 2024. The aim of the project is to create a self-sustaining ecosystem, studying the effects of both microgravity and radiation on the development and growth of these species.

As a test subject, zebrafish have several advantages.

How can sunlight reflecting off SpaceX's Starlink satellites interfere with ground-based operations? This is what a study recently posted to the arXiv preprint server hopes to address as a pair of researchers investigate how Starlink satellites appear brighter—which the researchers also refer to as flaring—to observers on Earth when the sun is at certain angles, along with discussing past incidents of how this brightness has influenced aerial operations on Earth.

This study holds the potential to help spacecraft manufacturers design and develop specific methods to prevent increased brightness levels, which would help alleviate confusion for observers on Earth regarding the source of the brightness and the objects in question.

Here, Universe Today discusses this research with Anthony Mallama of the IAU—Center for the Protection of Dark and Quiet Skies from Satellite Constellation Interference regarding the motivation behind the study, significant results, potential follow-up studies, importance of studying Starlink satellite brightness, and implications for managing satellite constellations in the future.