Across
1
The hours oddly spent churning over and over secret (4-4)
5
Stokes derides shifts (6)
10
Vertex of Summer Triangle – dependably evident nightly – essentially blue at the outset (5)
11
Scintillating 7, in my flying visits, representative of the bigger picture (9)
12
New lander first to penetrate alien world (3,6)
13
Ara represents this single missing blue-green star (5)
14
Evidence of fall, meteoric for one boxer (6)
15
Returning carrier ship receiving earth pictures, not immediately decipherable? (7)
18
Pounds, shillings and pence, steel warped (7)
20
One helps out leading characters (6)
22
Sample from traveller in G-suit, features of Saturn (5)
24
Buzz’s first problem after shortage – result of huge collapse (5,4)
25
One new member of quartet, Tim Peake, gutted Virgin (9)
26
As an alternative, cut celestial path (5)
27
Cherished by SpaceX – Eternal City (6)
28
Linesman’s not one for stress plugging in Empire State (8)
Down
1
What about launching a Soviet climber? (6)
2
Standards slipping, we fly at night (4-5)
3
See Phoebe, Bull and edges of 7 flying in astronomical equipment (6,9)
4
Discussion group remains animated (7)
6
People on radio to instruct landing outside Belgium are sadly cracking up (6,9)
7
I circle the sun bed occupied by mining engineer (5)
8
Most assuredly ground-to-air ceasefires will include confines of space (8)
9
Having visited e.g. 10, astronaut’s back home at last, he says (6)
16
It takes a lot to learn (6,3)
17
Characteristic of fans not winning game (8)
19
Group aboard last couple of rockets set up midnight rendezvous (6)
20
University types created cycles in unit (7)
21
Hardly the sphere of the old-fashioned scientist! (6)
23
Stars suddenly brighter and twinkly on average, before storm (5)