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Space Exploration Telescope

Space Exploration Telescope

Retiring soon
Set number
31378-1
Theme
Creator
Sub theme
Creator 3-in-1
Year
2026
Pieces
278
Age
8+
Availability
Retail
Packaging
Box
Box size (L × W × H)
8.7 × 10.3 × 2.4 in (22.2 × 26.2 × 6.2 cm)
Model size (L × W × H)
4.7 × 7.5 × 10.6 in (12 × 19 × 27 cm)
Box weight
1.05 lb (0.478 kg)
Retail price
  • US $34.99
  • Canada CAD $44.99
  • UK £29.99
  • Europe €34.99
Current market value
: Avg. New $47.10 +35% vs retail · Avg. Used $38.73
  • New median $45.00 · typical $37.71–$55.49 · 10 listings
  • Used median $37.50 · typical $31.21–$47.49 · 4 listings · few listings
asking prices · updated
Release date
2026-01-01
Retiring
2026-12-31
Shelf life
1 year
Instructions
Book 1 of 3 Book 2 of 3 Book 3 of 3
All 6 instruction PDFs

Parts (111 lots, 6 exclusive parts)

QtyPartNameColorSets
1 Arm Skeleton [Bent / 2 Clips] (Black) 93609 Arm Skeleton [Bent / 2 Clips] Black In 89 sets
2 Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip] (Black) 3484 Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip] Black In 192 sets
3 Bar 3L (Black) 87994 Bar 3L Black In 450 sets
5 Bar 5L with Handle (Friction Ram) (Black) 87618 Bar 5L with Handle (Friction Ram) Black In 92 sets
10 Bar Holder with Clip (Black) 11090 Bar Holder with Clip Black In 375 sets
2 Bracket 1 x 1 - 1 x 2 Inverted (Black) 73825 Bracket 1 x 1 - 1 x 2 Inverted Black In 200 sets
6 Brick Curved 2 x 2 x 2/3 (Black) 15068 Brick Curved 2 x 2 x 2/3 Black In 716 sets
1 Brick Curved 4 x 1 Double, No Studs (Black) 93273 Brick Curved 4 x 1 Double, No Studs Black In 380 sets
4 Brick Round 2 x 2 [Grill] (Black) 92947 Brick Round 2 x 2 [Grill] Black In 119 sets
4 Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] (Black) 85080 Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Black In 104 sets
4 Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs (Black) 48092 Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Black In 30 sets
5 Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) (Black) 54200 Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black In 1,146 sets
5 Brick Special 1 x 1 with Studs on 2 Adjacent Sides (Black) 26604 Brick Special 1 x 1 with Studs on 2 Adjacent Sides Black In 144 sets
2 Brick Special 1 x 2 with 2 Studs on 1 Side (Black) 11211 Brick Special 1 x 2 with 2 Studs on 1 Side Black In 412 sets
2 Plate 1 x 1 x 2/3 with Open Stud (Black) 86996 Plate 1 x 1 x 2/3 with Open Stud Black In 185 sets
6 Plate 1 x 2 (Black) 3023 Plate 1 x 2 Black In 2,911 sets
6 Plate 1 x 8 (Black) 3460 Plate 1 x 8 Black In 1,037 sets
3 Plate 2 x 2 (Black) 3022 Plate 2 x 2 Black In 2,338 sets
2 Plate 2 x 2 Corner (Black) 2420 Plate 2 x 2 Corner Black In 1,050 sets
9 Plate Round 1 x 1 with Open Stud (Black) 85861 Plate Round 1 x 1 with Open Stud Black In 697 sets
2 Plate Round 4 x 4 with 2 x 2 Round Opening (Black) 11833 Plate Round 4 x 4 with 2 x 2 Round Opening Black In 96 sets
2 Plate Round Half 4 x 8 (Black) 22888 Plate Round Half 4 x 8 Black In 66 sets
6 Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] (Black) 60897 Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Black In 482 sets
2 Plate Special 2 x 2 Splat Gear, 6 Teeth (Black) 35442 Plate Special 2 x 2 Splat Gear, 6 Teeth Black In 24 sets
1 Plate Special 4 x 4 with 2 x 2 Opening (Black) 64799 Plate Special 4 x 4 with 2 x 2 Opening Black In 159 sets
3 Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L (Black) 32828 Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Black In 470 sets
2 Plate Special Round 2 x 2 with Center Stud (Jumper Plate) (Black) 18674 Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Black In 322 sets
1 Technic Axle 12 (Black) 3708 Technic Axle 12 Black In 606 sets
2 Technic Axle Connector Smooth [with x Hole + Orientation] (Black) 59443 Technic Axle Connector Smooth [with x Hole + Orientation] Black In 536 sets
3 Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle (Black) 18651 Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black In 745 sets
2 Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] (Black) 14720 Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Black In 18 sets
2 Technic Gear 12 Tooth Double Bevel (Black) 32270 Technic Gear 12 Tooth Double Bevel Black In 632 sets
2 Technic Gear Rack 1/4 Circle 6 x 6, 15 Teeth (Black) 78442 Technic Gear Rack 1/4 Circle 6 x 6, 15 Teeth Black In 5 sets
12 Tile 1 x 4 with Groove (Black) 2431 Tile 1 x 4 with Groove Black In 1,276 sets
1 Tile 2 x 3 (Black) 26603 Tile 2 x 3 Black In 378 sets
2 Tile Special 1 x 1 with Clip with Rounded Edges (Black) 15712 Tile Special 1 x 1 with Clip with Rounded Edges Black In 744 sets
1 Weapon Chakram / Hoop Blade / Ring (Black) 35485 Weapon Chakram / Hoop Blade / Ring Black In 15 sets
3 Weapon Hilt Symmetric (Black) 66909 Weapon Hilt Symmetric Black In 71 sets
3 Window 1 x 2 x 2 Flat Front (Black) 60592 Window 1 x 2 x 2 Flat Front Black In 167 sets
4 Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs (Blue) 48092 Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Blue In 6 sets
1 Minifig Head, Globe, Bright Green Land Print (Blue) 28621pr0005 Minifig Head, Globe, Bright Green Land Print Blue Exclusive
2 Technic Axle Pin with Friction Ridges Lengthwise (Blue) 43093 Technic Axle Pin with Friction Ridges Lengthwise Blue In 2,438 sets
8 Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced (Blue) 32123b Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Blue In 11 sets
2 Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot (Blue) 42924 Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue In 608 sets
1 Tile Special 1 x 2 with Handle (Blue) 2432 Tile Special 1 x 2 with Handle Blue In 180 sets
1 Brick Special 1 x 2 with 2 Studs on 1 Side (Dark Azure) 11211 Brick Special 1 x 2 with 2 Studs on 1 Side Dark Azure In 11 sets
3 Plate 1 x 4 (Dark Azure) 3710 Plate 1 x 4 Dark Azure In 116 sets
3 Plate 1 x 8 (Dark Azure) 3460 Plate 1 x 8 Dark Azure In 31 sets
1 Technic Ball Joint (Dark Azure) 32474 Technic Ball Joint Dark Azure In 13 sets
5 Technic Brick 1 x 1 with Axle Hole (Dark Azure) 73230 Technic Brick 1 x 1 with Axle Hole Dark Azure In 11 sets
1 Technic Gear 20 Tooth with Axle Hole [+ Opening] (Dark Azure) 69779 Technic Gear 20 Tooth with Axle Hole [+ Opening] Dark Azure In 33 sets
1 Tile 1 x 2 with Groove (Dark Azure) 3069b Tile 1 x 2 with Groove Dark Azure In 119 sets
4 Plate Round Corner 4 x 4 (Dark Blue) 30565 Plate Round Corner 4 x 4 Dark Blue In 41 sets
3 Bar 2L with Towball (Dark Bluish Gray) 22484 Bar 2L with Towball Dark Bluish Gray In 257 sets
1 Bar 6L with Stop Ring (Dark Bluish Gray) 63965 Bar 6L with Stop Ring Dark Bluish Gray In 163 sets
1 Technic Beam 2 x 3 Thick [90° Offset Centre Beam Hole] (Dark Bluish Gray) 3167 Technic Beam 2 x 3 Thick [90° Offset Centre Beam Hole] Dark Bluish Gray In 36 sets
3 Technic Pin Connector Hub with 2 Perpendicular Axles (Dark Bluish Gray) 10197 Technic Pin Connector Hub with 2 Perpendicular Axles Dark Bluish Gray In 163 sets
1 Cone 1 x 1 [Top Groove] (Dark Turquoise) 59900 Cone 1 x 1 [Top Groove] Dark Turquoise In 12 sets
1 Technic Ball Joint (Dark Turquoise) 32474 Technic Ball Joint Dark Turquoise In 16 sets
3 Brick Curved 2 x 1 No Studs [1/2 Bow] (Light Bluish Gray) 11477 Brick Curved 2 x 1 No Studs [1/2 Bow] Light Bluish Gray In 443 sets
6 Plate Special 1 x 2 with Handle on End [Closed Ends] (Light Bluish Gray) 60478 Plate Special 1 x 2 with Handle on End [Closed Ends] Light Bluish Gray In 406 sets
2 Technic Pin Connector Hub Perpendicular 3L with 2 Pins (Light Bluish Gray) 2393 Technic Pin Connector Hub Perpendicular 3L with 2 Pins Light Bluish Gray In 49 sets
3 Technic Plate Rotor 3 Blade with Smooth Ends, 6 Studs, 1 Bottom Ridge (Propeller) (Light Bluish Gray) 51138 Technic Plate Rotor 3 Blade with Smooth Ends, 6 Studs, 1 Bottom Ridge (Propeller) Light Bluish Gray In 29 sets
1 Dome 1 x 1 x 2/3 (Light Nougat) 6908 Dome 1 x 1 x 2/3 Light Nougat In 6 sets
2 Plate Round Half 4 x 8 (Medium Azure) 22888 Plate Round Half 4 x 8 Medium Azure In 61 sets
1 Brick Round 2 x 2 Sphere with Stud [Plain] (Nougat) 20953 Brick Round 2 x 2 Sphere with Stud [Plain] Nougat Exclusive
2 Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] (Pearl Gold) 99563 Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] Pearl Gold In 255 sets
1 Weapon Chakram / Hoop Blade / Ring (Pearl Gold) 35485 Weapon Chakram / Hoop Blade / Ring Pearl Gold In 37 sets
1 Brick 2 x 2 (Red) 3003 Brick 2 x 2 Red In 897 sets
1 Technic Axle 2 Notched (Red) 32062 Technic Axle 2 Notched Red In 2,234 sets
1 Technic Ball Joint (Red) 32474 Technic Ball Joint Red In 137 sets
1 Tile Special 1 x 2 with Handle (Red) 2432 Tile Special 1 x 2 with Handle Red In 199 sets
1 Technic Axle 5 with Stop (Reddish Brown) 15462 Technic Axle 5 with Stop Reddish Brown In 451 sets
2 Technic Axle Pin without Friction Ridges Lengthwise (Tan) 3749 Technic Axle Pin without Friction Ridges Lengthwise Tan In 1,436 sets
1 Technic Ball Joint (Tan) 32474 Technic Ball Joint Tan In 14 sets
1 Dome Hemisphere 4 x 4 (Trans-Clear) 86500 Dome Hemisphere 4 x 4 Trans-Clear In 10 sets
1 Glass for Window 1 x 2 x 2 Flat with Crescent Moon on Black Background Print (Trans-Clear) 60601pr0019 Glass for Window 1 x 2 x 2 Flat with Crescent Moon on Black Background Print Trans-Clear Exclusive
1 Glass for Window 1 x 2 x 2 Flat with Planet, Stars on Black Background Print (Trans-Clear) 60601pr0018 Glass for Window 1 x 2 x 2 Flat with Planet, Stars on Black Background Print Trans-Clear Exclusive
1 Glass for Window 1 x 2 x 2 Flat with Stars on Black Background Print (Trans-Clear) 60601pr0020 Glass for Window 1 x 2 x 2 Flat with Stars on Black Background Print Trans-Clear Exclusive
1 Light Brick 2 x 3 x 1 1/3 with Dark Bluish Gray Base [Yellow LED] (Trans-Clear) 62930 Light Brick 2 x 3 x 1 1/3 with Dark Bluish Gray Base [Yellow LED] Trans-Clear In 56 sets
2 Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] (Trans-Clear) 61252 Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Trans-Clear In 30 sets
2 Brick 1 x 1 (White) 3005 Brick 1 x 1 White In 1,623 sets
1 Brick Round 1 x 1 Open Stud (White) 3062b Brick Round 1 x 1 Open Stud White In 701 sets
1 Brick Round 2 x 2, Pin Holes (White) 17485 Brick Round 2 x 2, Pin Holes White In 58 sets
1 Brick Round 2 x 2 Truncated Cone (White) 98100 Brick Round 2 x 2 Truncated Cone White In 111 sets
1 Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' Orientation (White) 30361c Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' Orientation White In 33 sets
28 Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] (White) 85080 Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] White In 152 sets
2 Brick Sloped 30° 1 x 2 x 2/3 (White) 85984 Brick Sloped 30° 1 x 2 x 2/3 White In 765 sets
1 Brick Special 1 x 1 with Studs on 2 Sides (White) 47905 Brick Special 1 x 1 with Studs on 2 Sides White In 94 sets
1 Brick Special 1 x 2 x 1 2/3 with 8 Studs on 3 Sides (White) 67329 Brick Special 1 x 2 x 1 2/3 with 8 Studs on 3 Sides White In 78 sets
5 Cylinder Half 2 x 4 x 2 with 1 x 2 Cutout (White) 24593 Cylinder Half 2 x 4 x 2 with 1 x 2 Cutout White In 16 sets
4 Plate 1 x 1 (White) 3024 Plate 1 x 1 White In 1,506 sets
2 Plate Round 4 x 4 with 2 x 2 Round Opening (White) 11833 Plate Round 4 x 4 with 2 x 2 Round Opening White In 27 sets
1 Plate Round 4 x 4 with Pin Hole (White) 60474 Plate Round 4 x 4 with Pin Hole White In 274 sets
2 Plate Round Corner 2 x 2 with 1 x 1 Cutout (White) 79491 Plate Round Corner 2 x 2 with 1 x 1 Cutout White In 46 sets
1 Plate Special 1 x 2 Rounded with 2 Open Studs (White) 35480 Plate Special 1 x 2 Rounded with 2 Open Studs White In 438 sets
1 Tile Round 1 x 1 (White) 98138 Tile Round 1 x 1 White In 401 sets
2 Tile, Star with Stud Holder, Pin Hole (White) 11609 Tile, Star with Stud Holder, Pin Hole White In 16 sets
2 Turntable 2 x 2 Female (White) 27448 Turntable 2 x 2 Female White In 117 sets
1 Technic Panel Dome 5 x 5 with Axle Holes (Yellow) 7343 Technic Panel Dome 5 x 5 with Axle Holes Yellow In 2 sets
1 Technic Panel Dome 5 x 5 with Pin Holes (Yellow) 4412 Technic Panel Dome 5 x 5 with Pin Holes Yellow Exclusive
1 Tile Special 1 x 2 with Handle (Yellow) 2432 Tile Special 1 x 2 with Handle Yellow In 232 sets
1 Bar 3L (Black) 87994 Bar 3L Black In 450 sets extra
1 Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) (Black) 54200 Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black In 1,146 sets extra
1 Plate Round 1 x 1 with Open Stud (Black) 85861 Plate Round 1 x 1 with Open Stud Black In 697 sets extra
1 Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L (Black) 32828 Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Black In 470 sets extra
1 Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced (Blue) 32123b Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Blue In 11 sets extra
1 Dome 1 x 1 x 2/3 (Light Nougat) 6908 Dome 1 x 1 x 2/3 Light Nougat In 6 sets extra
1 Plate 1 x 1 (White) 3024 Plate 1 x 1 White In 1,506 sets extra
1 Tile Round 1 x 1 (White) 98138 Tile Round 1 x 1 White In 401 sets extra
1 Tile, Star with Stud Holder, Pin Hole (White) 11609 Tile, Star with Stud Holder, Pin Hole White In 16 sets extra

Building instructions

PDFs from LEGO.com. The same booklet is often printed in several versions (e.g. V29 EU A4 format, V39 US Letter format).