Rare parts in 31378-1: Space Exploration Telescope

This set inventory has been obtained from LEGO Customer Services replacement parts page. It was retrieved on 23 March 2026 and contains 278 pieces.

Important note: We do not control this inventory and cannot currently make changes to it. Use it as a guide to the contents of the set, or to find out part numbers when requesting replacements.

Element Image Qty Colour Category Design Element name Element
in sets		 Element
introduced in		 Design
in sets		 Design
introduced in
6451564 <h1><a href='/parts/6451564/1-4-circle-gear-rack-6x6'>1/4 CIRCLE, GEAR RACK 6X6</a></h1><div class='tags floatleft'><a href='/parts/6451564/1-4-circle-gear-rack-6x6'>6451564</a> <a href='/parts/design-78442'>78442</a> <a href='/parts/platform-Technic'>Technic</a> <a href='/parts/category-Vehicles-Transportation'>Vehicles & Transportation</a> <a href='/parts/colour-Black'>Black</a> <a href='/parts/year-2023'>2023</a></div><div class='floatright'>©2023 LEGO Group</div>

1/4 CIRCLE, GEAR RACK 6X6

6451564 78442 Technic Vehicles & Transportation Black 2023
©2023 LEGO Group
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2 Black Vehicles & Transportation 78442 1/4 CIRCLE, GEAR RACK 6X6 3 2023 5 2021
6589143 <h1><a href='/parts/6589143/mini-head-no-4845'>MINI HEAD, NO. 4845</a></h1><div class='tags floatleft'><a href='/parts/6589143/mini-head-no-4845'>6589143</a> <a href='/parts/design-116017'>116017</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Minifigure-Parts'>Minifigure Parts</a> <a href='/parts/colour-Bright-Blue'>Bright Blue</a> <a href='/parts/year-2026'>2026</a></div><div class='floatright'>©2026 LEGO Group</div>

MINI HEAD, NO. 4845

6589143 116017 System Minifigure Parts Bright Blue 2026
©2026 LEGO Group
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1 Bright Blue Minifigure Parts 116017 MINI HEAD, NO. 4845 1 2026 1 2026
6592650 <h1><a href='/parts/6592650/dome-5x5x2-5-w-cross-hole'>DOME 5X5X2.5, W/ CROSS HOLE</a></h1><div class='tags floatleft'><a href='/parts/6592650/dome-5x5x2-5-w-cross-hole'>6592650</a> <a href='/parts/design-4412'>4412</a> <a href='/parts/platform-Technic'>Technic</a> <a href='/parts/category-Technic-Beams'>Technic Beams</a> <a href='/parts/colour-Bright-Yellow'>Bright Yellow</a> <a href='/parts/year-2026'>2026</a></div><div class='floatright'>©2026 LEGO Group</div>

DOME 5X5X2.5, W/ CROSS HOLE

6592650 4412 Technic Technic Beams Bright Yellow 2026
©2026 LEGO Group
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1 Bright Yellow Technic Beams 4412 DOME 5X5X2.5, W/ CROSS HOLE 1 2026 3 2025
6595303 <h1><a href='/parts/6595303/1-2-sphere-5x5x3-w-cross-hole'>1/2 SPHERE 5X5X3, W/ CROSS HOLE</a></h1><div class='tags floatleft'><a href='/parts/6595303/1-2-sphere-5x5x3-w-cross-hole'>6595303</a> <a href='/parts/design-7343'>7343</a> <a href='/parts/platform-Technic'>Technic</a> <a href='/parts/category-Technic-Beams'>Technic Beams</a> <a href='/parts/colour-Bright-Yellow'>Bright Yellow</a> <a href='/parts/year-2025'>2025</a></div><div class='floatright'>©2025 LEGO Group</div>

1/2 SPHERE 5X5X3, W/ CROSS HOLE

6595303 7343 Technic Technic Beams Bright Yellow 2025
©2025 LEGO Group
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1 Bright Yellow Technic Beams 7343 1/2 SPHERE 5X5X3, W/ CROSS HOLE 2 2025 4 2025
6592648 <h1><a href='/parts/6592648/double-sphere-2x2x1-2-3-w-knob'>DOUBLE SPHERE 2X2X1 2/3, W/ KNOB</a></h1><div class='tags floatleft'><a href='/parts/6592648/double-sphere-2x2x1-2-3-w-knob'>6592648</a> <a href='/parts/design-37837'>37837</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Bricks'>Bricks</a> <a href='/parts/colour-Nougat'>Nougat</a> <a href='/parts/year-2026'>2026</a></div><div class='floatright'>©2026 LEGO Group</div>

DOUBLE SPHERE 2X2X1 2/3, W/ KNOB

6592648 37837 System Bricks Nougat 2026
©2026 LEGO Group
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1 Nougat Bricks 37837 DOUBLE SPHERE 2X2X1 2/3, W/ KNOB 1 2026 40 2019
6589144 <h1><a href='/parts/6589144/glass-for-frame-1x2x2-no-18'>GLASS FOR FRAME 1X2X2, NO. 18</a></h1><div class='tags floatleft'><a href='/parts/6589144/glass-for-frame-1x2x2-no-18'>6589144</a> <a href='/parts/design-116018'>116018</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Buildings-Furniture'>Buildings & Furniture</a> <a href='/parts/colour-Transparent'>Transparent</a> <a href='/parts/year-2026'>2026</a></div><div class='floatright'>©2026 LEGO Group</div>

GLASS FOR FRAME 1X2X2, NO. 18

6589144 116018 System Buildings & Furniture Transparent 2026
©2026 LEGO Group
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1 Transparent Buildings & Furniture 116018 GLASS FOR FRAME 1X2X2, NO. 18 1 2026 1 2026
6589145 <h1><a href='/parts/6589145/glass-for-frame-1x2x2-no-19'>GLASS FOR FRAME 1X2X2, NO. 19</a></h1><div class='tags floatleft'><a href='/parts/6589145/glass-for-frame-1x2x2-no-19'>6589145</a> <a href='/parts/design-116019'>116019</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Buildings-Furniture'>Buildings & Furniture</a> <a href='/parts/colour-Transparent'>Transparent</a> <a href='/parts/year-2026'>2026</a></div><div class='floatright'>©2026 LEGO Group</div>

GLASS FOR FRAME 1X2X2, NO. 19

6589145 116019 System Buildings & Furniture Transparent 2026
©2026 LEGO Group
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1 Transparent Buildings & Furniture 116019 GLASS FOR FRAME 1X2X2, NO. 19 1 2026 1 2026
6589146 <h1><a href='/parts/6589146/glass-for-frame-1x2x2-no-20'>GLASS FOR FRAME 1X2X2, NO. 20</a></h1><div class='tags floatleft'><a href='/parts/6589146/glass-for-frame-1x2x2-no-20'>6589146</a> <a href='/parts/design-116020'>116020</a> <a href='/parts/platform-System'>System</a> <a href='/parts/category-Buildings-Furniture'>Buildings & Furniture</a> <a href='/parts/colour-Transparent'>Transparent</a> <a href='/parts/year-2026'>2026</a></div><div class='floatright'>©2026 LEGO Group</div>

GLASS FOR FRAME 1X2X2, NO. 20

6589146 116020 System Buildings & Furniture Transparent 2026
©2026 LEGO Group
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1 Transparent Buildings & Furniture 116020 GLASS FOR FRAME 1X2X2, NO. 20 1 2026 1 2026