April 2025 is shaping up to be an eventful and visually stunning month for amateur astronomers and astrophotographers alike. Sarah Matthews, an astrophotographer and host of the “Space Guide” series, walks viewers through a lineup of exciting astronomical events, planetary movements, deep sky imaging opportunities, and even some cosmic mysteries. The month delivers vibrant planetary conjunctions, the year’s first significant meteor shower, and a remarkable moment for the Venus-Moon pair. It’s also a great time to capture both deep space nebulae and our galaxy’s rising core, whether you're based in the Southern or Northern Hemisphere.
The month kicks off with a celestial gathering that favors early risers. Starting around April 1, Mercury, Venus, and Saturn begin forming a tight triangle in the pre-dawn eastern sky. For those with the stamina to greet the morning darkness, this configuration offers a rare chance to observe these planets grouped closely together. Over the first two weeks of April, this trio will gradually drift southeast and rise earlier each day, improving visibility. Saturn, which has been lost behind the Sun for the past couple of months, finally returns to view. Meanwhile, Neptune also edges into the scene by mid-month. Although it remains near the Sun’s glare, it aligns with Mercury on April 16 in what’s known as a conjunction. A fun fact to accompany this is that Neptune boasts the fastest winds in the solar system, reaching speeds over 1,200 miles per hour.
As April progresses, Venus emerges as the month’s showstopper. It climbs higher each morning and becomes increasingly prominent in the eastern sky, culminating in its greatest brightness on April 24. That same morning features a conjunction with the crescent Moon, creating a rare and beautiful sight. Both celestial bodies will appear as crescents, making it a golden opportunity for astrophotography. Photographers with long focal length telescopes can attempt a composite image capturing detailed crescents of both Venus and the Moon. Those opting for wide-angle lenses will still capture a visually stunning moment.
April's full moon rises on the 12th and carries the designation of a “micro moon.” The term refers to the moon being near apogee, the point in its elliptical orbit when it’s farthest from Earth. Because the moon’s orbit isn’t a perfect circle, its distance from Earth varies. When full moons coincide with apogee, they appear slightly smaller and dimmer. While this difference is subtle to the naked eye, a micro moon can be approximately 14% smaller and 30% less bright than a “super moon,” which occurs near perigee, the moon’s closest point to Earth.
Space science also sees a notable update this month. On April 20, the Lucy spacecraft, launched in 2021 to study the Trojan asteroids near Jupiter, will make a key flyby of an asteroid named Donald Johanson. This flyby serves as a mission-critical checkpoint before Lucy continues its journey to the Trojans. The asteroid’s name honors the paleontologist who discovered the famed Lucy hominid fossil, drawing a poetic connection between humanity’s terrestrial past and our spacefaring future.
April 27 brings the new moon, an optimal window for deep sky observation and imaging due to the absence of moonlight. It's also a prime time for capturing the Milky Way in the early morning hours. The Southern and Northern Hemispheres each offer unique targets for astrophotographers during this dark sky period.
In the Southern Hemisphere, one standout is the Prawn Nebula, a bright emission nebula located in the tail of the Scorpius constellation, approximately 6,000 light years away. Rich in hydrogen-alpha emissions, it’s a great target for those using narrowband filters or astromodified cameras. It's also beginner-friendly and can be captured effectively even in moderately light-polluted areas. Focal lengths between 200 mm and 500 mm work well here, with ISO settings around 800 to 1,600 depending on the camera. With a fast optical system and dark skies, even a single night of imaging can produce impressive results.
Another Southern Hemisphere gem is the Coalsack Nebula. This dark nebula lies near the Southern Cross and appears as a black void cutting into the rich star fields of the Milky Way. It can be imaged at a wide range of focal lengths, from as wide as 50 mm to more medium views at 135 mm. As always, more integration time results in a better image. With the Milky Way core rising earlier each morning, April is also an excellent time to attempt panoramic arch shots of our galaxy.
For observers in the Northern Hemisphere, April is right in the heart of galaxy season. The night sky points away from the galactic plane, making distant galaxies more prominent. One highlight is Messier 101, the Pinwheel Galaxy, located a staggering 21 million light years away. This face-on spiral galaxy has rich hydrogen regions scattered throughout its arms, making it a suitable candidate for both broadband and narrowband imaging. Focal lengths between 500 mm and 1,000 mm are ideal, though even smaller sensors can make do with shorter focal lengths and cropping.
Another fascinating target is the Dark Shark Nebula, located in the constellation Cepheus. This target combines a dark nebula and a reflection nebula, together forming an ominous shark-like shape. It's a striking subject for long exposures and a creative composition in any astrophotographer’s portfolio.
Wrapping up the month is one of astronomy’s oldest recurring events, the Lyrid meteor shower. Active from April 15 through April 29, the Lyrids are the oldest recorded meteor shower in history, with human observations dating back over 2,700 years. The peak occurs on the night of April 22, when conditions will be favorable thanks to a late-rising Moon and the proximity to the new moon on April 27. This timing ensures a darker sky, maximizing visibility for meteors.
Viewers in dark sky locations can expect to see between 10 to 20 meteors per hour during the peak. For best results, observers should look to the east or southeast. While telescopes are unnecessary for meteor viewing, photographers are encouraged to use wide-angle lenses (ranging from 14 mm to 35 mm) and set up continuous or long exposure shots. Patience is key, give your eyes 25 to 35 minutes to adapt to the dark. A tripod and spare batteries are essential gear, and Sarah Matthews humorously reminds viewers to bring snacks but dispose of waste responsibly.
To cap off the April guide, Matthews teases a mind-bending theory that suggests we might be living inside a black hole. Although this idea has been speculated about for some time, recent data from the James Webb Space Telescope (JWST) has rekindled interest. The telescope observed that the spin direction of many galaxies doesn’t quite make sense according to standard cosmological models. One possible explanation, however outlandish it may seem, is that our universe could be inside a black hole. While this remains a speculative hypothesis, it exemplifies the continual wonder and mystery that drive curiosity in space exploration.
With April packed with planetary pairings, moon phases, space missions, nebulae, galaxies, and ancient meteor showers, it offers an exceptional array of opportunities for skywatchers and photographers. From the scientific milestones of the Lucy spacecraft to the poetic beauty of Venus and the Moon sharing the sky, the month blends education with awe. Sarah Matthews signs off hoping for clear skies for everyone and hints at an even more exciting meteor shower coming in May. Whether you’re a seasoned astrophotographer or just beginning to look up, April 2025 offers something remarkable in the heavens for all to witness.
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