List of space telescopes
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This list is incomplete; you can help by expanding it.
This list of space telescopes (astronomical space observatories) is grouped by major frequency ranges: gamma ray, x-ray, ultraviolet, visible, infrared, microwave and radio. Telescopes that work in multiple frequency bands are included in all of the appropriate sections. Space telescopes that collect particles, such as cosmic ray nuclei and/or electrons, as well as instruments that aim to detect gravitational waves, are also listed. Missions that look solely within the Solar System, including the Earth, Sun, and other planets within our system, are mostly excluded; see List of Solar System probes for these.
Two values are provided for the dimensions of the initial orbit. For telescopes in Earth orbit, the min and max altitude are given in kilometers. For telescopes in solar orbit, the minimum distance (periapsis) and the maximum distance (apoapsis) between the telescope and the center of mass of the sun are given in astronomical units (AU).
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Active telescopes |
Defunct telescopes |
Contents
Gamma ray
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Gamma ray telescopes collect and measure individual, high energy gamma rays from astrophysical sources. These are absorbed by the atmosphere, requiring that observations are done by high-altitude balloons or space missions. Gamma rays can be generated by supernovae, neutron stars, pulsars and black holes. Gamma ray bursts, with extremely high energies, have also been detected but have yet to be identified.[1]
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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3rd High Energy Astronomy Observatory (HEAO 3) | NASA | 20 September 1979 | 29 May 1981 | Earth orbit (486.4–504.9 km) | [2][3][4] |
100px | Astrorivelatore Gamma ad Immagini LEggero (AGILE) | ISA | 23 April 2007 | — | Earth orbit (524–553 km) | [5][6] |
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Compton Gamma Ray Observatory (CGRO) | NASA | 5 April 1991 | 4 June 2000 | Earth orbit (362–457 km) | [7][8][9] |
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Cos-B | ESA | 9 August 1975 | 25 April 1982 | Earth orbit (339.6–99,876 km) | [10][11][12] |
Gamma | USSR, CNES, RSA | 1 July 1990 | 1992 | Earth orbit (375 km) | [13] | |
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Fermi Gamma-ray Space Telescope | NASA | 11 June 2008 | — | Earth orbit (555 km) | [14] |
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Granat | CNRS & IKI | 1 December 1989 | 25 May 1999 | Earth orbit (2,000–200,000 km) | [15][16][17] |
High Energy Transient Explorer 2 (HETE 2) | NASA | 9 October 2000 | 2007 ? | Earth orbit (590–650 km) | [18][19][20] | |
International Gamma Ray Astrophysics Laboratory (INTEGRAL) | ESA | 17 October 2002 | — | Earth orbit (639–153,000 km) | [21][22] | |
Low Energy Gamma Ray Imager (LEGRI) | INTA | 19 May 1997 | 2002 | Earth orbit (600 km) | [23][24] | |
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Second Small Astronomy Satellite (SAS 2) | NASA | 15 November 1972 | 8 June 1973 | Earth orbit (443–632 km) | [25][26] |
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Swift Gamma Ray Burst Explorer | NASA | 20 November 2004 | — | Earth orbit (585–604 km) | [27][28] |
X-ray
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X-ray telescopes measure high-energy photons called X-rays. These can not travel a long distance through the atmosphere, meaning that they can only be observed high in the atmosphere or in space. Several types of astrophysical objects emit X-rays, from galaxy clusters, through black holes in active galactic nuclei to galactic objects such as supernova remnants, stars, and binary stars containing a white dwarf (cataclysmic variable stars), neutron star or black hole (X-ray binaries). Some Solar System bodies emit X-rays, the most notable being the Moon, although most of the X-ray brightness of the Moon arises from reflected solar X-rays. A combination of many unresolved X-ray sources is thought to produce the observed X-ray background.
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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1st High Energy Astronomy Observatory (HEAO 1) | NASA | 12 August 1977 | 9 January 1979 | Earth orbit (445 km) | [29][30][31] | |
3rd High Energy Astronomy Observatory (HEAO 3) | NASA | 20 September 1979 | 29 May 1981 | Earth orbit (486.4–504.9 km) | [2][3][4] | |
A Broadband Imaging X-ray All-sky Survey (ABRIXAS) | DLR | 28 April 1999 | 1 July 1999 | Earth orbit (549–598 km) | [32][33][34] | |
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Advanced Satellite for Cosmology and Astrophysics (ASCA, Astro-D) | ISAS & NASA | 20 February 1993 | 2 March 2001 | Earth orbit (523.6–615.3 km) | [35][36] |
100px | AGILE | ISA | 23 April 2007 | — | Earth orbit (524–553 km) | [5][6] |
Ariel V | SRC & NASA | 15 October 1974 | 14 March 1980 | Earth orbit (520 km) | [37][38] | |
Array of Low Energy X-ray Imaging Sensors (Alexis) | LANL | 25 April 1993 | 2005 | Earth orbit (749–844 km) | [39][40][41] | |
Aryabhata | ISRO | 19 April 1975 | 23 April 1975 | Earth orbit (563–619 km) | [42] | |
Astron | IKI | 23 March 1983 | June 1989 | Earth orbit (2,000—200,000 km) | [43][44][45] | |
Astronomical Netherlands Satellite (ANS) | SRON | 30 August 1974 | June 1976 | Earth orbit (266–1176 km) | [46][47] | |
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Astrosat | ISRO | 28 September 2015 | — | Earth orbit (600–650 km) | [48][49][50] |
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BeppoSAX | ASI | 30 April 1996 | 30 April 2002 | Earth orbit (575–594 km) | [51][52][53] |
Broad Band X-ray Telescope / Astro 1 | NASA | 2 December 1990 | 11 December 1990 | Earth orbit (500 km) | [54][55] | |
Chandra X-ray Observatory | NASA | 23 July 1999 | — | Earth orbit (9,942–140,000 km) | [56][57] | |
Cos-B | ESA | 9 August 1975 | 25 April 1982 | Earth orbit (339.6–99,876 km) | [10][11][12] | |
Cosmic Radiation Satellite (CORSA) | ISAS | 6 February 1976 | 6 February 1976 | Failed launch | [58][59] | |
100px | Einstein Observatory (HEAO 2) | NASA | 13 November 1978 | 26 April 1981 | Earth orbit (465–476 km) | [60][61] |
EXOSAT | ESA | 26 May 1983 | 8 April 1986 | Earth orbit (347–191,709 km) | [62][63][64] | |
Ginga (Astro-C) | ISAS | 5 February 1987 | 1 November 1991 | Earth orbit (517–708 km) | [65][66][67] | |
Granat | CNRS & IKI | 1 December 1989 | 25 May 1999 | Earth orbit (2,000–200,000 km) | [15][16][17] | |
Hakucho (CORSA-b) | ISAS | 21 February 1979 | 16 April 1985 | Earth orbit (421–433 km) | [68][69][70] | |
High Energy Transient Explorer 2 (HETE 2) | NASA | 9 October 2000 | — | Earth orbit (590–650 km) | [18][19][71] | |
International Gamma Ray Astrophysics Laboratory (INTEGRAL) | ESA | 17 October 2002 | — | Earth orbit (639–153,000 km) | [21][22] | |
Nuclear Spectroscopic Telescope Array (NuSTAR) | NASA | 13 June 2012 | — | Earth orbit (603.5 km) | [72][73] | |
ROSAT | NASA & DLR | 1 June 1990 | 12 February 1999 | Re-entry 23 October 2011.[74] Formerly Earth orbit (580 km) |
[75][76][77] | |
Rossi X-ray Timing Explorer (RXTE) | NASA | 30 December 1995 | 3 January 2012 | Earth orbit (409 km) | [78][79][80] | |
Suzaku (Astro-E2) | JAXA & NASA | 10 July 2005 | — | Earth orbit (550 km) | [81][82] | |
Swift Gamma Ray Burst Explorer | NASA | 20 November 2004 | — | Earth orbit (585–604 km) | [27][28] | |
Tenma (Astro-B) | ISAS | 20 February 1983 | 19 January 1989 | Earth orbit (489–503 km) | [83][84][85] | |
Third Small Astronomy Satellite (SAS-C) | NASA | 7 May 1975 | April 1979 | Earth orbit (509–516 km) | [86][87][88] | |
Uhuru | NASA | 12 December 1970 | March 1973 | Earth orbit (531–572 km) | [89][90][91] | |
XMM-Newton | ESA | 10 December 1999 | — | Earth orbit (7,365–114,000 km) | [92][93] |
Ultraviolet
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Ultraviolet telescopes make observations at ultraviolet wavelengths, i.e. between approximately 10 and 320 nm. Light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space.[94] Objects emitting ultraviolet radiation include the Sun, other stars and galaxies.[95]
Photo | Name | Space Agency | Launch Date | Terminated | Observing Location | Ref(s) |
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Astro 2 | NASA | 2 March 1993 | 18 March 1993 | Earth orbit (349–363 km) | [96][97] | |
Astron | IKI | 23 March 1983 | June 1989 | Earth orbit (2,000–200,000 km) | [43][44][45] | |
Far Ultraviolet Camera/Spectrograph (UVC) | NASA | 16 April 1972 | 23 April 1972 | Descartes Highlands on Lunar surface | [98] | |
Astronomical Netherlands Satellite (ANS) | SRON | 30 August 1974 | June 1976 | Earth orbit (266–1176 km) | [46][47] | |
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Astrosat | ISRO | 28 September 2015 | — | Earth orbit (600–650 km) | [49][48][50] |
Broad Band X-ray Telescope / Astro 1 | NASA | 2 December 1990 | 11 December 1990 | Earth orbit (500 km) | [54][55] | |
Cosmic Hot Interstellar Spectrometer (CHIPS) | NASA | 13 January 2003 | 11 April 2008 | Earth orbit (578–594 km) | [99][100] | |
Extreme Ultraviolet Explorer (EUVE) | NASA | 7 June 1992 | 31 January 2001 | Earth orbit (515–527 km) | [101][102] | |
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Far Ultraviolet Spectroscopic Explorer (FUSE) | NASA & CNES & CSA | 24 June 1999 | 12 July 2007 | Earth orbit (752–767 km) | [103][104] |
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Galaxy Evolution Explorer (GALEX) | NASA | 28 April 2003 | 28 June 2013 | Earth orbit (691–697 km) | .[105][106][107] |
Hisaki (SPRINT-A) | JAXA | 14 September 2013 | — | — | [108] | |
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Hubble Space Telescope | NASA & ESA | 24 April 1990 | — | Earth orbit (586.47–610.44 km) | [109] |
Interface Region Imaging Spectrograph (IRIS) | NASA | 27 June 2013 | — | Earth orbit | [110][111] | |
International Ultraviolet Explorer (IUE) | ESA & NASA & SERC | 26 January 1978 | 30 September 1996 | Earth orbit (32,050–52,254 km) | [112][113] | |
Korea Advanced Institute of Science and Technology Satellite 4 (Kaistsat 4) | KARI | 27 September 2003 | 2007 ? | Earth orbit (675–695 km) | [114][115] | |
OAO-2 (Stargazer) | NASA | 7 December 1968 | January 1973 | Earth orbit (749–758 km) | [116][117] | |
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OAO-3 Copernicus | NASA | 21 August 1972 | February 1981 | Earth orbit (713–724 km) | [116] |
Orion 1 and Orion 2 Space Observatories | USSR | 19 April 1971 (Orion 1) ; (Orion 2) December 18, 1973 | 1971; 1973 | Earth orbit (Orion 1: 200–222 km; Orion 2: 188–247 km) | [118][119] | |
Swift Gamma Ray Burst Explorer (Swift) | NASA | 20 November 2004 | — | Earth orbit (585–604 km) | [27][28] | |
Venus Spectral Rocket Experiment | NASA | 26 November 2013 | reusable | suborbital to 300 km | [120] |
UV ranges listed at Ultraviolet astronomy#Ultraviolet space telescopes.
Visible
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The oldest form of astronomy, optical or visible-light astronomy extends from approximately 400 to 700 nm.[121] Positioning an optical telescope in space means that the telescope does not see any atmospheric effects (see astronomical seeing), providing higher resolution images. Optical telescopes are used to look at stars, galaxies, planetary nebulae and protoplanetary disks, amongst many other things.[122]
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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Astrosat | ISRO | 28 September 2015 | — | Earth orbit (600–650 km) | [48][49][50] |
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BRITE constellation | Austria, Canada, Poland | 2013–2014 | — | Earth orbit | [123] |
COROT | CNES & ESA | 27 December 2006 | 2013 | Earth orbit (872–884 km) | [124][125] | |
Hipparcos | ESA | 8 August 1989 | March 1993 | Earth orbit (223–35,632 km) | [126][127][128] | |
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Hubble Space Telescope | ESA&NASA | 24 April 1990 | — | Earth orbit (586.47–610.44 km) | [109] |
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Kepler Mission | NASA | 6 March 2009 | — | Earth-trailing heliocentric orbit | [129][130][131] |
MOST | CSA | 30 June 2003 | — | Earth orbit (819–832 km) | [132][133] | |
Swift Gamma Ray Burst Explorer | NASA | 20 November 2004 | — | Earth orbit (585–604 km) | [27][28] | |
Gaia mission (astrometry) | ESA | 19 December 2013 | — | Sun-Earth L2 Lagrange point | [134] |
Infrared and Submillimetre
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Infrared light is of lower energy than visible light, hence is emitted by cooler objects. As such, the following can be viewed in the infrared: cool stars (including brown dwarves), nebulae, and redshifted galaxies.[135]
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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Akari (Astro-F) | JAXA | 21 February 2006 | 24 November 2011[136] | Earth orbit (586.47–610.44 km) | [137][138] | |
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Herschel Space Observatory | ESA & NASA | 14 May 2009 [139] | 29 April 2013[140] | Sun-Earth L2 Lagrange point | [141][142][143] |
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IRAS | NASA | 25 January 1983 | 21 November 1983 | Earth orbit (889–903 km) | [144][145] |
Infrared Space Observatory (ISO) | ESA | 17 November 1995 | 16 May 1998 | Earth orbit (1000–70500 km) | [146][147][148] | |
Infrared Telescope in Space | ISAS & NASDA | 18 March 1995 | 25 April 1995 | Earth orbit (486 km) | [149][150] | |
Midcourse Space Experiment (MSX) | USN | 24 April 1996 | 26 February 1997 | Earth orbit (900 km) | [151] | |
Spitzer Space Telescope | NASA | 25 August 2003 | — | Solar orbit (0.98–1.02 AU) | [152][153] | |
Submillimeter Wave Astronomy Satellite (SWAS) | NASA | 6 December 1998 | Last used in 2005 | Earth orbit (638–651 km) | [154][155] | |
Wide Field Infrared Explorer (WIRE) | NASA | 5 March 1999 | no observations | Re-entered May 10, 2011[156] | [157] | |
Wide-field Infrared Survey Explorer (WISE) | NASA | 14 December 2009 | (hibernation Feb 2011-Aug 2013) | Earth orbit (500 km) | [158][159][160] |
Microwave
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Microwave space telescopes have primarily been used to measure cosmological parameters from the Cosmic Microwave Background. They also measure synchrotron radiation, free-free emission and spinning dust from our Galaxy, as well as extragalactic compact sources and galaxy clusters through the Sunyaev-Zel'dovich effect.[citation needed]
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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Cosmic Background Explorer (COBE) | NASA | 18 November 1989 | 23 December 1993 | Earth orbit (900 km) | [161][162] |
Odin | Swedish Space Corporation | 20 February 2001 | — | Earth orbit (622 km) | [163][164] | |
Planck | ESA | 14 May 2009 | October 2013 | Sun-Earth L2 Lagrange point(mission) Heliocentric (Derelict) |
[142][165][166] | |
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WMAP | NASA | 30 June 2001 | October 2010 | Sun-Earth L2 Lagrange point | [167] |
Radio
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As the atmosphere is transparent for radio waves, radio telescopes in space are of most use for Very Long Baseline Interferometry; doing simultaneous observations of a source with both a satellite and a ground-based telescope and by correlating their signals to simulate a radio telescope the size of the separation between the two telescopes. Observations can be of supernova remnants, masers, gravitational lenses, starburst galaxies, and many other things.
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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Highly Advanced Laboratory for Communications and Astronomy (HALCA, VSOP or MUSES-B) | ISAS | 12 February 1997 | 30 November 2005 | Earth orbit (560–21,400 km) | [168][169][170] | |
Spektr-R (RadioAstron) | ASC LPI | May 2011 | — | Earth orbit (10,000–390,000 km) | [171][172][173] |
Particle detection
Spacecraft and space-based modules that do particle detection, looking for cosmic rays and electrons. These can be emitted by the sun (Solar Energetic Particles), our galaxy (Galactic cosmic rays) and extragalactic sources (Extragalactic cosmic rays). There are also Ultra-high-energy cosmic rays from active galactic nuclei.
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
---|---|---|---|---|---|---|
3rd High Energy Astrophysics Observatory (HEAO 3) | NASA | 20 September 1979 | 29 May 1981 | Earth orbit (486.4–504.9 km) | [2][3][4] | |
Alpha Magnetic Spectrometer 01 (AMS-01) | NASA | 2 June 1998 | 12 June 1998 | Earth orbit (296 km) | [174] | |
Alpha Magnetic Spectrometer 02 (AMS-02) | NASA | 16 May 2011 | — | Earth orbit (353 km) | [175] | |
IBEX | NASA | 19 October 2008 | — | Earth orbit | [176] | |
Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) | ISA, INFN, RSA, DLR & SNSB | 15 May 2006 | — | Earth orbit (350–610 km) | [177][178] | |
SAMPEX | NASA / DE | 3 July 1992 | 30 June 2004 | Earth orbit | [179] | |
Dark Matter Particle Explorer (DAMPE) | CNSA | 17 December 2015 | — | — | [180] |
Gravitational waves
A proposed new type of telescope is one that detects gravitational waves; ripples in space-time generated by colliding neutron stars and black holes.
Photo | Name | Space Agency | Launch Date | Terminated | Location | Ref(s) |
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eLISA (see also LISA Pathfinder) | ESA | 2034? | - | Heliocentric orbit | [181] |
To be launched
Not in space yet:
Photo | Name | Space Agency | Planned
Launch Date |
Terminated | Location | Ref(s) |
---|---|---|---|---|---|---|
Astro-H | JAXA | February 2016 | — | — | [182] | |
Hard X-ray Modulation Telescope (HXMT) | CNSA | 2016 | — | — | [183] | |
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James Webb Space Telescope | NASA/ESA/CSA | October 2018 | — | On Earth. Planned for Sun-Earth L2 Lagrange point | [184] |
Proposed
List of proposed space observatories: examples of past and present space observatory plans, concepts, and proposals. For observatories in orbit see, List of space telescopes.
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See also
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Wikimedia Commons has media related to Space telescopes. |
References
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 109.0 109.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 116.0 116.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.[dead link]
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 142.0 142.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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