does lord krishna have control over the planets in astrology?
The us Government makes laws. In that sense they have control over US law. The police and courts enforce the laws, invested with the power of the US Government. Still it is the citizens who either break or obey the laws. The Government or police does not (ldeally, at least) bend the laws to make an innocent person guilty or a guilty person innocent.
Similarly Krsna has made the Purusha. the Purusha makes the universe with all it’s laws. The planets and other devas enforce the laws being invested with the power of the Purusha, who is the conduit for the power of Krishna. So in this sense Krishna has control of all the planets.
But the planets, Purusha and Krishna do not exercise favoritism. They use their control over fate only to ensure that it is enforced impariatially. Just as it is the citizens who control their punishment or reward by deciding if they will contradict or cooperate with the laws – similarly it is only you and I who truly controls our own fates.
who should we worship to ease the negatives of our planets?
Merely the concept of wishing to worship will itself ease the negativities, because most of the negativity arises from refusal to cooperate with higher authorities and powers. Worship ameliorates this rebelliousness, and therefore in and of itself is very efficacious for easing karmic negativity.
Those who still desire to enjoy power and prestige in the temporary world should worship various temporary deities to get their petty desires fulfilled. Those who are lucky and smart will want a permanent solution to suffering and negativity – and they will therefore seek emancipation. Such persons can only worship Vishnu’s category of divinity – for Vishnu is the god of pure clarity (sattva-guna), and therefore he alone can grant emancipation to pure clarity. I discuss this in more detail in my reading of the Bhagavata, here: On God and Gods
also when we die do we go straight to our next life?
No. Time is extremely complex and difficult to grasp. It is not as iron clad as the human mind in this era of human history perceives it to be. Aeons and milliseconds can be equalized by the powers of the universe. So time is a bit irrelevant what considering some questions, such as this one.
Every individual is slightly different. The general process, as far as I understand it, is that some time is spend in disconnecting ones emotions and attachments to the body and identity and life which has just expired. Thereafter, Yamaraja – the ultimate judge of karma – takes sometime to review things. Thereafter one is sent to the next destination. But the next destination is not always a birth in a conventional sense. Sometimes it is a manifestation on higher or lower planes of existence (heavens and hells). So there is a flexible amount of time, could be short or long, between one tangible birth and the next. Also the next tangible birth is (quite often nowadays) in subhuman wombs. Depending on how low down the evolutionary chain the birth is, it can take quite some time before the soul ascends the evolutionary ladder again to have the Human opportunity. Therefore there is absolutely no set time between one human birth and the next.
and why are there so many lower life forms than humans,
The universe was created for souls who dreamed of enjoying Gods varieties. Most of that is done very nicely through the minds and senses of various creatures.
The human form of life is quite sophisticated. The special feature of being a human is having intellect, and therefore the ability to communicate and thus read knowledge that humanity has accumulated. So the true purpose of human life is to elevate oneself and improve one’s fundamental nature, not just to enjoy the varieties of manifestation in Gods creation – but to come into better harmony with that creation, not as an enjoyer of it but as a lover, a giver of love to God through it. So interest in this facility is comparatively quite scarce among all the souls here in this world. Even among those who take human birth, explicit interest in such topics is relatively scarce. Therefore there is little need for zillions of human beings to exist at a time, or for there to be zillions of humanlike species. That said, however, I have heard that the Veda specifies 400,000 subspecies of humanity. Though I have no idea how fine the differentiation has to be to get that many, nor do I think that all 400,000 of them co-exist at the same points in history.
is the human life something that is very hard to get back after this life is over?
Not if you have not wasted your human life. If you have made use of your human facilities, nature will quite happily supply you with another one immediately or quite soon – probably even an improved one. But yes, after wasting a human life by not utilizing its intellect to come into better harmony with creation and God… then it usually takes quite a while, but it depends on how severely one has no interest in the human faculties.