Skip to main content
48 votes
Accepted

What are the teeth on the edge of Venera 13 and 14?

The teeth served an aerodynamic function. ...metal teeth were added to the periphery of the impact ring in an effort to reduce the spin and oscillation during the descent and prevent the rough ...
Organic Marble's user avatar
15 votes
Accepted

Are Zond 2 and Venera 4 basically the same spacecraft design? What were the differences?

Very short answer They are different generations of the same family of interplanetary spacecrafts. Short answer Zond 2, as well as Zond 1 and -3; and Venera 2 and -3, were interplanetary ...
Sergiy Lenzion's user avatar
9 votes
Accepted

Parachute material used for the Venera probes to survive 500 °C

technically it was fiberglass with acrylic fibers - "стеклонитрон"("glass-nitron"). It was necessary to get down through the hot atmosphere quickly, but not hit the surface too ...
A. Rumlin's user avatar
  • 7,863
9 votes
Accepted

Archimedean braking for low density Venus lander + subsidiary question

Surprisingly the answer is yes there was studies done on that subject. A simple google search could yield this result: BUOYANT PLANETARY ENTRY https://apps.dtic.mil/dtic/tr/fulltext/u2/642361.pdf ...
Antzi's user avatar
  • 12.6k
8 votes
Accepted

Piece of debris in Venera 13 surface photos

A protective cap As scientists in the control center eagerly awaited color images from Venus, sad news was announced, "There is a strong signal, but no modulation." All of the protective ...
A. Rumlin's user avatar
  • 7,863
7 votes
Accepted

With and without refilling at LEO, how much more than the landers weight of the Venera 9 mission could a Starship deliver near a pole of Venus?

Orbital refilling (as Musk stresses) is critical to any deep space ambitions for Starship. In the latest (Feb. 2022) Starship update Musk said so (re: orbital refilling, emphasis added): This is ...
BrendanLuke15's user avatar
6 votes

How did the Venera Probes manage to safely descend to the surface of Venus?

There are some very different concerns here, but I think I can address a couple of them: First, why was it necessary for the Russians to land at local Noon on those days? Noon is the time of day ...
SE - stop firing the good guys's user avatar
6 votes
Accepted

How far can you see on the surface of Venus?

Apparently you can't see very far, but not because of mist. The visibility was a pleasant surprise to the scientists who, after reviewing Venera 8, had predicted a dark, murky and dusty atmosphere in ...
Organic Marble's user avatar
5 votes
Accepted

How was the radius of Venus measured so accurately (± 3 km) via radar in the mid 1960's, before Venera 4 and Mariner 5?

In 1964, the Soviet scientist A.D. Kuzmin, together with the American scientist Barry Clark, began observing Venus using a movable radiointerferometer consisting of two 27-meter paraboloids (Owens ...
A. Rumlin's user avatar
  • 7,863
4 votes
Accepted

Thrust value for space mission from Earth's orbit to Venus' orbit

A couple of considerations I replicated your hyperbolic Hohmann calculation for Earth, and got 3.46 km/s. Close to your value. But for the Venus part, the numbers seem off. Assuming a helocentric ...
SE - stop firing the good guys's user avatar
4 votes

Thrust value for space mission from Earth's orbit to Venus' orbit

To a first approximation, thrust doesn't matter. If it takes 3 minutes instead of 2 to apply the delta-V to go from Earth orbit to a Venus transfer, it makes no odds. Beyond that first approximation, ...
Steve Linton's user avatar
  • 19.6k
4 votes

Venera mission image data format

After a lot of looking, I found http://mentallandscape.com/C_CatalogVenus.htm "A digital video signal was transmitted from the lander to the orbiting main spacecraft and recorded on tape. It ...
Radio's user avatar
  • 171
3 votes

How far can you see on the surface of Venus?

There is no sulfuric acid fog on the surface of Venus. Sulfuric acid clouds, formed in the upper atmosphere when dissociated oxygen reacts with water and sulfur dioxide, rains down towards the surface ...
Oscar Lanzi's user avatar
  • 8,525
2 votes

How was the radius of Venus measured so accurately (± 3 km) via radar in the mid 1960's, before Venera 4 and Mariner 5?

This was indeed quite a challenge. The main advantage was having the mariner probe there. By determining the effect of Venus on the orbit of mariner, Having the exact distance to the surface of Venus ...
ANone's user avatar
  • 3,442
2 votes

What are the teeth on the edge of Venera 13 and 14?

I think the teeth should be used for camera calibration. The very dense atmosphere of Venus outside the camera window of the lander had a magnifing effect like a lens. This effect is known from scuba ...
Uwe's user avatar
  • 49k
1 vote

Thrust value for space mission from Earth's orbit to Venus' orbit

Concerning thrust values in previous Venus missions here are some examples. A lot of first Russian probes in "Venera" ("Venus") series was launched by the R-7 family launcher with &...
Peter Nazarenko's user avatar
1 vote

How were Venera's variometers able to measure extremely weak, nano-Tesla magnetic fields?

Described as a "flux-gate magnetometer". In book "Means of measurement of magnetic field parameters": Венеры, Марса и других планет. С помощью этих приборов установлены основные закономерности ...
A. Rumlin's user avatar
  • 7,863

Only top scored, non community-wiki answers of a minimum length are eligible