The 678004 Review: A Dual-Mode STEM Planetarium Projector
The Thames & Kosmos Planetarium Projector offers an accessible, educational astronomy experience with rotating star maps and JWST images, best suited for close-projection use in darkened rooms.
By Elvis Dicki
Updated October 21, 2026
For families or educators looking to bring the cosmos indoors, the 678004 from Thames & Kosmos presents an intriguing option. Marketed as a dual-mode planetarium projector, this device aims to transform any darkened room into a personal theater of stars and deep-space imagery, leveraging authentic maps and images from the James Webb Space Telescope. At its core, it is an educational STEM tool designed to foster an interest in astronomy through hands-on projection, making it a solid pick for those seeking an engaging, visual introduction to the night sky without the need for a telescope or clear weather.
This review analyzes the 678004 based on its provided specifications, manufacturer claims, and aggregated user feedback to determine its strengths, limitations, and ideal use cases. The bottom line: it is a versatile and compact projector that excels in creating an immersive, educational atmosphere in bedrooms or classrooms, though its performance is highly dependent on optimal room darkness and projection distance.
Prime Thames & Kosmos Planetarium Projector Dual Star
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The 678004 at a Glance
| Specification | Detail |
|---|---|
| Model Number | 678004 |
| Projector Type | Dual-mode (Rotating Star Map & Image Slide) |
| Star Maps Included | Northern & Southern Hemispheres, Constellations |
| Image Disks Included | 4 disks with James Webb Space Telescope images |
| Power | USB-C (cord included) |
| Setup Options | Tabletop or wall-mounted |
| Timer Function | Auto-off at 15, 30, or 60 minutes |
| Additional Mode | Nightlight (reduced brightness) |
| Material | Plastic |
| Included Components | Projector, USB-C cord, 2 star maps, 4 image disks, color poster |
Design and Build
The 678004 features a compact, space-saving design measuring 6.5 x 6.5 x 7.8 inches and weighing approximately 0.5 kg. Its construction is plastic, which, according to the provided data, some users may find less premium than expected. The design prioritizes functionality and flexibility, allowing it to be placed on a flat surface or hung on a wall, making it suitable for various room configurations. The unit houses two distinct projector systems: a main dome for the rotating star maps and a secondary slot for inserting the JWST image disks. The form factor is clearly intended for ease of use in domestic environments like bedrooms, as emphasized by its nightlight mode and auto-off timer, which cater to bedtime or quiet study sessions.
Performance and Features
Dual Projector System and Imagery
The key selling point is the dual-projector system. The primary projector uses domed star maps that rotate, simulating the natural movement of stars through the night sky. It includes astronomically accurate maps for both the northern and southern hemispheres, as well as a map of constellations. The secondary projector casts space-themed images from four different disks, all featuring authentic imagery from the James Webb Space Telescope, depicting planets, human-made space objects, and extragalactic phenomena. These two projectors can be used simultaneously or independently, allowing for a layered and detailed exploration of space. However, the image disks must be manually swapped to change the projected scene.
Projection Quality and Requirements
Performance is heavily influenced by environmental factors. The manufacturer and user reviews consistently state that the best results require a completely darkened room. Furthermore, the throw range is reported to be limited. User feedback indicates that projections become “extremely blurry” or lose crispness when the projector is too far from the surface, working best “very close to the surface projected on.” For optimal clarity, some users found mounting the projector at a sufficient height, such as on a lamp stand, was necessary. This makes it more suitable for smaller rooms or for projecting onto ceilings and walls from a relatively short distance.
Usability and Educational Value
The 678004 is designed as a STEM educational tool. Features like the rotating star maps, accurate constellation outlines, and real JWST images are intended to aid in learning and retention. The included color educational poster supplements the hands-on experience. The nightlight mode with adjustable brightness and the auto-off timer (15, 30, or 60 minutes) add convenience and safety, making it practical for extended viewing sessions or as a calming bedtime fixture. The device is powered via a USB-C cord, offering flexibility in power source location, and requires no batteries.
Setup, Support and Ownership
Setup appears straightforward, with the device arriving pre-assembled. The main considerations are choosing between tabletop or wall-mount placement and ensuring access to a USB power source. There is no data provided regarding long-term software updates, warranty specifics, or available accessory options from the manufacturer beyond the included components. Ownership seems centered on the core experience of using the provided star maps and image disks. As a product from Thames & Kosmos, a known brand in educational kits, one might expect a baseline level of support, but details are not listed in the provided data.
What Owners Say
Owner sentiment is largely positive, reflected in the overall rating. Many praise its value, educational impact, and the enjoyment it brings, particularly to children. Positive reviews highlight the “cool star maps,” the accurate constellation projections, and the product’s suitability as a gift. Criticisms primarily focus on the projection limitations. Several users note the short throw distance and the resulting blurriness when used in larger rooms, with one describing it as “not what I was hoping for” due to this constraint. The requirement for a very dark room is also reiterated. The rating distribution shows a majority of five-star reviews, with a smaller but notable portion of one-star reviews, often linked to performance expectations not being met.
Pros and Cons
Pros
- Dual projector system offers versatile astronomical displays.
- Includes accurate rotating star maps for both hemispheres.
- Features authentic James Webb Space Telescope imagery.
- Compact design allows for tabletop or wall-mounted setup.
- Educational focus supports STEM learning.
- Convenient timer and nightlight mode for extended use.
Cons
- Requires a completely darkened room for best effect.
- Limited throw range; images blur at a distance.
- Plastic construction may feel less durable.
- Image disks must be manually changed.
- Performance can be disappointing in larger rooms.
- Some users report domed film distortion at the edges.
Who Should Buy It (and Who Should Skip It)
The The 678004 is an ideal purchase for parents or educators seeking an engaging, visual STEM tool to spark an interest in astronomy for children. It is perfectly suited for use in a child’s bedroom, a small classroom, or a dedicated playroom where lights can be fully dimmed and the projector can be placed close to the ceiling or wall. Its timer and nightlight functions make it particularly appealing for bedtime routines. It would also make a thoughtful gift for a young space enthusiast.
Conversely, those looking for a high-fidelity planetarium experience to fill a large living room or who expect crystal-clear, wide-area projections from across the room should likely skip this model. Its performance limitations in larger, not-perfectly-dark spaces mean it won’t meet those expectations. Adults seeking a sophisticated, high-end display for personal use might also find its construction and manual disk-swapping less appealing.
Final Verdict
The Thames & Kosmos Planetarium Projector succeeds as an accessible entry point into educational astronomy. Its dual-projector design, featuring rotating star maps and stunning JWST imagery, provides a unique and immersive way to learn about the night sky and deep space. The inclusion of features like a timer and nightlight mode shows thoughtful design for its target domestic environment. When used within its intended parameters—a dark room with a close projection surface—it delivers on its promise of transforming a space into a personal planetarium theater.
However, its value is contingent on managing expectations. It is not a high-power projector for large venues but a focused educational toy. The plastic build and need for manual disk changes are trade-offs for its affordability and compactness. For the right user—a family with a curious child, a teacher with a small group, or a gift-giver looking for a STEM-focused present—the The 678004 represents a compelling option that balances educational content with engaging functionality. For more expert analysis on tech gear and educational tools, explore our dedicated Tech Gear and Reviews sections.
FAQs
Does the 678004 require batteries?
No, the 678004 does not require batteries. It is powered via an included USB-C cord, which needs to be connected to a suitable USB power source, such as a wall adapter or a power bank.
Can you see the projections in a room with some light?
For the best and most vivid results, the manufacturer and user reviews strongly recommend using the projector in a completely darkened room. Ambient light will significantly wash out the projections, reducing clarity and impact.
Are the star maps accurate?
Yes, according to the product details, the included star maps are astronomically accurate. They depict the northern and southern hemispheres and include an accurate map of the constellations. User reviews also corroborate the accuracy of the constellation positions.
Is the 678004 suitable for adult astronomy enthusiasts?
It is primarily designed as an educational tool for children and families. While an adult might appreciate the JWST imagery and accurate star maps, the toy-like plastic construction, manual disk swapping, and limited projection range may not satisfy a serious adult enthusiast looking for a high-end display device.
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.