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  1. 1oldman2
    Featured

    B "Space and Stuff"

    ... 19
    Sep 20, 2017 at 3:39 PM

    379

    272
    Replies: 379
  1. William Nelso

    B Cosmic ray charge

    Sep 21, 2017 at 8:08 AM

    9

    0
    Replies: 9
  2. riz

    B Black body radiation

    Sep 21, 2017 at 4:32 AM

    1

    1
    Replies: 1
  3. Cody Richeson

    B The "why" behind time dilation

    N/A

    –
    Replies: –
  4. Ygggdrasil
    Featured

    B A terrestrial, temperate planet around Proxima Centauri

    ... 3
    Sep 20, 2017 at 9:35 PM

    59

    40
    Replies: 59
  5. CygnusX-1

    B The Most Primitive Star-Forming Galaxy Ever Found

    Sep 20, 2017 at 11:12 AM

    2

    2
    Replies: 2
  6. revv

    B What was the reaction to the Hubble telescope's pictures?

    Sep 20, 2017 at 6:11 AM

    11

    10
    Replies: 11
  7. Bmaxwell

    B Could we shade the Earth from the Sun to save Earth?

    ... 2
    Sep 18, 2017 at 5:53 PM

    26

    5
    Replies: 26
  8. Lunct

    B How does the earth's magnetic field stop radiation?

    ... 2
    Sep 17, 2017 at 7:29 PM

    24

    16
    Replies: 24
  9. bruha

    B Telescope photo of Vega

    Sep 17, 2017 at 1:56 PM

    3

    2
    Replies: 3
  10. Shawn Landau

    B Miscellaneous Trivia: Planets and Moons

    Sep 17, 2017 at 9:53 AM

    7

    0
    Replies: 7
  11. smartalek86

    B limits on interferometers

    Sep 16, 2017 at 3:52 PM

    1

    1
    Replies: 1
  12. davidge

    B Collision of stars

    Sep 15, 2017 at 9:47 AM

    14

    4
    Replies: 14
  13. wolram

    B What do you think of the new names for features on Pluto

    Sep 15, 2017 at 9:37 AM

    2

    1
    Replies: 2
  14. kolleamm

    B Pale Blue Dot Project

    Sep 14, 2017

    6

    3
    Replies: 6
  15. CygnusX-1

    B Uranus's Moon Cressida is Doomed

    Sep 6, 2017

    5

    8
    Replies: 5
  16. efdee

    B Ball lightning and stars

    Sep 2, 2017

    9

    5
    Replies: 9
  17. bluecap

    B Dark matter variations on Earth

    ... 3
    Sep 2, 2017

    43

    17
    Replies: 43
  18. lifeonmercury

    B Asteroid Florence

    Sep 1, 2017

    2

    0
    Replies: 2
  19. asesena

    B A Hypothesis To Observe The Formation Of Earth

    Aug 29, 2017

    12

    5
    Replies: 12
  20. mfb

    B Most detailed picture of Antares

    Aug 28, 2017

    8

    10
    Replies: 8
  21. arabianights

    B Questions about the eclipse

    Aug 27, 2017

    3

    7
    Replies: 3
  22. tony873004

    B Asteroid Florence will soon pass Earth

    Aug 27, 2017

    1

    2
    Replies: 1
  23. rasp

    B Today's Solar eclipse A dud

    ... 2
    Aug 26, 2017

    21

    15
    Replies: 21
  24. FactChecker

    B What do we learn from eclipse that the NASA IRIS doesn't tell us?

    Aug 25, 2017

    9

    9
    Replies: 9
  25. BenAS

    B Is it possible to see sunspots with the unaided eye?

    Aug 24, 2017

    15

    8
    Replies: 15
  26. Wallsy

    B If spacetime can be bent can it be broken?

    Aug 24, 2017

    14

    5
    Replies: 14
  27. DaveC426913

    B Capture in a 2-body system (not)

    Aug 20, 2017

    2

    0
    Replies: 2
  28. Pgottsha84

    B Question about the shape of the Universe

    Aug 18, 2017

    8

    4
    Replies: 8
  29. Suppaman

    B Goldilocks zones of other parameters

    Aug 18, 2017

    13

    1
    Replies: 13
  30. Igottaknow

    B A thought on the expansion of the Universe

    Aug 17, 2017

    2

    0
    Replies: 2
  31. wolram

    B Our galaxy hosts millions of Black Holes

    Aug 16, 2017

    12

    2
    Replies: 12
  32. BL4CKB0X97

    B Is blue shift as common as red shift?

    Aug 16, 2017

    18

    7
    Replies: 18
  33. KBon

    B Can gravitational waves interfere with each other?

    ... 2
    Aug 16, 2017

    30

    1
    Replies: 30
  34. Tryannosaurus

    B Would we be able to completely stop time?

    Aug 11, 2017

    5

    1
    Replies: 5
  35. Wallsy

    B Why don't galaxies obey gravity?

    ... 2
    Aug 7, 2017

    37

    15
    Replies: 37
  36. tionis

    B Stationary Orbit

    Aug 6, 2017

    10

    8
    Replies: 10
  37. Spinnor

    B Picture of "very" blue galaxy, good place for super nova?

    Aug 6, 2017

    11

    6
    Replies: 11
  38. Wallsy

    B Help me understand light traveling through vast distances in space

    ... 2
    Aug 5, 2017

    26

    4
    Replies: 26
  39. Perpetual Student

    B Can someone please identify what I saw? (lights in the night sky)

    ... 2
    Aug 4, 2017

    25

    15
    Replies: 25
  40. Timvanhoomissen

    B How can light travel around an object in space?

    Aug 2, 2017

    1

    0
    Replies: 1
  41. Erenjaeger

    B Unsure of astrophysics unit

    Jul 31, 2017

    2

    3
    Replies: 2
  42. CygnusX-1

    B Fast Radio Burst Pinned Down to Giant Stellar Nursery

    Jul 30, 2017

    9

    4
    Replies: 9
  43. bruha

    B Star telescope photo

    Jul 26, 2017

    7

    0
    Replies: 7
  44. Suekdccia

    B It's not sure but Andromeda will likely hit us -- Is this true?

    ... 2
    Jul 22, 2017

    21

    6
    Replies: 21
  45. Anon5000

    B Gas behaviour in Space

    Jul 21, 2017

    6

    3
    Replies: 6
  46. Mr Joe Bangles

    B Kepler's 3rd Law, geometric relationship?

    Jul 15, 2017

    6

    0
    Replies: 6
  47. |Glitch|

    B Brown Dwarf Minimum Mass

    ... 2
    Jul 14, 2017

    31

    6
    Replies: 31
  48. friend

    B Do black holes radiate antimatter?

    ... 2
    Jul 10, 2017

    35

    2
    Replies: 35
  49. VladZH

    B Inclinations of star orbits in the Milky Way

    Jul 10, 2017

    4

    2
    Replies: 4
  50. |Glitch|

    B Luhman 16AB

    Jul 10, 2017

    6

    2
    Replies: 6
  51. Inderjeet Singh

    B Can this be another reason for dark energy?

    Jul 9, 2017

    4

    0
    Replies: 4
  52. MrsTesla

    B Sidereal Time and the Arctic Circle

    Jul 8, 2017

    2

    2
    Replies: 2
  53. davidge

    B Planets in other galaxies

    Jul 8, 2017

    4

    3
    Replies: 4
  54. gdarie

    B Machine learning + Kepler data

    Jul 5, 2017

    10

    0
    Replies: 10
  55. Sanborn Chase

    B Solar system planetary orbits

    Jul 1, 2017

    5

    1
    Replies: 5
  56. hamischism

    B Star trails and the Earth's movemement

    ... 3
    Jun 30, 2017

    43

    43
    Replies: 43
  57. Negativebeef

    B Warp Drive and constant speed

    Jun 25, 2017

    2

    1
    Replies: 2
  58. TheQuestionGuy14

    B Question About The Stars -- Can they have died before we see their light?

    Jun 21, 2017

    5

    4
    Replies: 5
  59. Dr Wu

    B Earth-Sun Lagrange Points Distance Query

    Jun 19, 2017

    3

    0
    Replies: 3
  60. lifeonmercury

    B The Wow! signal

    ... 2
    Jun 17, 2017

    22

    19
    Replies: 22
  61. CygnusX-1

    B General Relativity Aces a Test at Supermassive Black Hole

    Jun 16, 2017

    1

    2
    Replies: 1
  62. Jason R Carrico

    B Neutron stars and black holes

    ... 3
    Jun 14, 2017

    58

    18
    Replies: 58
  63. CygnusX-1

    B The Hottest Giant Planet Yet: 7800 degrees F.!

    Jun 12, 2017

    4

    4
    Replies: 4
  64. John Dalton

    B Presence of gases on Pluto

    Jun 7, 2017

    6

    2
    Replies: 6
  65. jack action

    B Solar System Map

    Jun 4, 2017

    12

    14
    Replies: 12
  66. Lunct

    B How do we know the size of the universe?

    May 31, 2017

    6

    1
    Replies: 6
  67. Zahid Hasan

    B NASA's Mars Plan May Include a Yearlong Mission to the Moon

    ... 2
    May 22, 2017

    25

    17
    Replies: 25
  68. CygnusX-1

    B First Direct Measurement of Brown Dwarf Mass Limit: 6.7% Sun

    ... 2
    May 22, 2017

    26

    3
    Replies: 26
  69. lpetrich

    B Ocean planets? Desert planets?

    May 20, 2017

    3

    2
    Replies: 3
  70. Chrono_13

    B A Question about tiny tiny stars, and radiating heat

    May 18, 2017

    13

    1
    Replies: 13
  71. Uzbar Zibil Tarag

    B Cepheid Variable Stars and Space-Time Warping

    May 15, 2017

    7

    3
    Replies: 7
  72. RICKYtan

    B How much effect does the moon's gravity/size have on Mars?

    May 15, 2017

    4

    2
    Replies: 4
  73. CygnusX-1

    B Earth may owe its birth to a solar eruption

    May 12, 2017

    3

    3
    Replies: 3
  74. GTOM

    B Survival on Mars?

    ... 13
    May 10, 2017

    259

    45
    Replies: 259
  75. Sullivan Stockwell

    B The Early Universe and the Laws of Physics

    May 8, 2017

    1

    0
    Replies: 1
  76. Pyrus

    B How do we define "space"?

    May 7, 2017

    6

    3
    Replies: 6
  77. hsdrop

    B The Earth's magnetic field and moon

    May 5, 2017

    11

    4
    Replies: 11
  78. CygnusX-1

    B Super-Earth Found in Habitable Zone of Nearby Red Dwarf

    Apr 29, 2017

    13

    6
    Replies: 13
  79. Allen_Wolf

    B Hawking radiation

    Apr 27, 2017

    1

    0
    Replies: 1
  80. Glenn G

    B Aristotle and geocentric

    Apr 26, 2017

    5

    0
    Replies: 5
  81. madison bond

    B Eccentricity of orbits

    Apr 25, 2017

    6

    0
    Replies: 6
  82. Go Nucelar

    B Adding a huge electric charge to a black hole?

    ... 2
    Apr 21, 2017

    30

    6
    Replies: 30
  83. BillTre

    B New NASA Image Library

    Apr 20, 2017

    1

    5
    Replies: 1
  84. Jarvis323

    B Where have we looked, or are looking, for life?

    Apr 17, 2017

    9

    4
    Replies: 9
  85. TreeLover

    B An exercise related to the mass of the Milky Way, sort of.

    Apr 12, 2017

    2

    0
    Replies: 2
  86. Vivek Siddarth K

    B Big Bang expansion question

    Apr 6, 2017

    3

    1
    Replies: 3
  87. Tim Layton

    B Finding a black hole

    Apr 6, 2017

    2

    1
    Replies: 2
  88. CosmologyHobbyist

    B Radar & Jupiter Great Red Spot

    Apr 4, 2017

    1

    1
    Replies: 1
  89. Singlau

    B Black hole mass and sigma (velocity dispersion)

    Apr 2, 2017

    5

    0
    Replies: 5
  90. lifeonmercury

    B Hellas Basin

    Mar 31, 2017

    10

    1
    Replies: 10
  91. kolleamm

    B A good quality telescope?

    Mar 30, 2017

    18

    6
    Replies: 18
  92. Colm

    B If the universe is expanding at an accelerating rate...

    Mar 27, 2017

    3

    2
    Replies: 3
  93. Colm

    B How do we know the stars are not our own light falling back.

    Mar 27, 2017

    4

    1
    Replies: 4
  94. lifeonmercury

    B Artic circle on the Moon

    Mar 21, 2017

    1

    0
    Replies: 1
  95. Nick Levinson

    B How fast is Earth traveling due to the Hubble constant?

    ... 3
    Mar 21, 2017

    43

    13
    Replies: 43
  96. Jay Suh

    B Are Black Holes just stars?

    Mar 20, 2017

    7

    0
    Replies: 7
  97. lifeonmercury

    B The clouds of Venus

    Mar 20, 2017

    12

    3
    Replies: 12
  98. lifeonmercury

    B What would happen to the Moon if (at full moon) the Earth disappeared?

    Mar 20, 2017

    7

    1
    Replies: 7
  99. Steven Hansel

    B How do you know the size/maximum area of a gravity field

    Mar 20, 2017

    4

    2
    Replies: 4
  100. Enis

    B What are the applications of solar sails?

    Mar 18, 2017

    1

    0
    Replies: 1
Showing threads 1 to 100 of 417

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