Artemis II returns from Moon & SpaceX Starlink launch at Vandenberg - Space News (Apr 18, 2026)

[0:37] Artemis II returns from Moon

NASA’s Artemis II mission has completed a major milestone for human deep-space flight. Four astronauts—Reid Wiseman, Victor Glover, Christina Koch, and Canada’s Jeremy Hansen—returned to Earth with a Pacific Ocean splashdown on April 10 after a ten-day mission around the Moon. During the flight, the crew set a new record for distance from Earth, surpassing Apollo 13’s mark, and carried out manual piloting demonstrations and far-side lunar observations that feed directly into planning for future missions and eventual sustained operations near and on the lunar surface.

For skywatchers, April’s celestial lineup is unusually strong thanks to a new moon and elevated geomagnetic activity. A G2, or moderate, geomagnetic storm watch for April 17 and 18 could push aurora visibility farther south than normal, potentially into parts of the U.S. mid-latitudes, while moonless skies improve contrast for faint structures. The report also highlights classic April targets: Venus in the west after sunset, a pre-dawn grouping of Mars, Saturn, and Mercury, and binocular challenges like Uranus and Neptune depending on conditions.

The Lyrid meteor shower is the week’s headline sky event, active from April 16 through 25 and peaking around April 21 and 22. The Lyrids, sourced from debris left by Comet Thatcher, are among the oldest recorded meteor showers, with typical peak rates cited around 10 to 20 meteors per hour and occasional higher outbursts. Even with a waxing moon around peak, the report notes the Moon sets after midnight, leaving the pre-dawn hours—roughly 3 to 5 a.m. local time—as the best window for darker skies and higher radiant altitude.

A comet may also reward early risers: Comet C/2025 R3, or PanSTARRS, is expected to brighten through late April, with the report calling out mid-April as a good viewing opportunity and a closest approach to Earth on April 27 at roughly 44 million miles. Forecast brightness near magnitude 8 suggests binoculars or a small telescope for most observers, with viewing described in the pre-dawn eastern sky in the region of Pegasus and above Pisces for the Northern Hemisphere, and later shifting to evening visibility for Southern Hemisphere observers in early May.

On the research front, the report spotlights a major advance in galaxy modeling: the COLIBRE simulations, published in Monthly Notices of the Royal Astronomical Society, which incorporate more realistic treatments of cold gas and cosmic dust—the ingredients that actually form stars and shape what telescopes see. By better capturing how gas cools and how dust affects galaxy appearance, the simulations are presented as a stronger match to observations from the early universe through today, including comparisons to James Webb Space Telescope results.

Webb itself is also challenging categories in planetary science. Astronomers used JWST to study 29 Cygni b, an object around 15 times Jupiter’s mass, right on the boundary between massive planets and brown dwarfs. The reported atmospheric chemistry and metal enrichment, along with an orbit aligned to the host star’s rotation axis, supports a bottom-up formation through disk accretion—suggesting planet-like formation may extend to higher masses than previously assumed.

Meanwhile, Hubble continues delivering detailed views of the nearby universe, including imagery of the barred spiral galaxy IC 486 in Gemini, about 380 million light-years away. The report describes a bright central bar, smooth spiral arms, and an active nucleus powered by a supermassive black hole exceeding 100 million solar masses. And in upcoming observatories, NASA’s Nancy Grace Roman Space Telescope is described as finishing construction and nearing the end of prelaunch testing, setting the stage for wide-field, deep-sky surveys and next-step capabilities in exoplanet imaging.